XFX Pro Series Core Edition Power Supply Review

paulktreg - 2011-01-23 14:21:14 in Power Supplies
Category: Power Supplies
Reviewed by: paulktreg   
Reviewed on: February 17, 2011
Price: PRO650W=$89.00/PRO750W=$109.00/PRO850W=$129.00

Introduction:

XFX is a division of PINE Technology Holdings Limited, a respected and world-renowned presence in the gaming industry. PINE designs, develops, manufactures and distributes high-performance graphics cards and computer peripherals. Founded in 1989, PINE’s main headquarters are situated in the Hong Kong Special Administrative Region (Hong Kong SAR). The company has two state-of-the-art research and development facilities in Taiwan and Shenzhen, technical support offices in the US, Europe and Asia, a factory in China and now sells its products in over 50 countries.

XFX are perhaps best known for their high performance ATI and NVIDIA graphics cards and motherboards. Power supplies are a relatively new venture for company. The XFX Black and XXX edition power supplies, their first offerings, proved popular and performed very well and are now joined by three new power supplies. The XFX Pro Series Core Edition power supply range retains the industrial theme of their predecessors, include a 650W, 750W and 850W variant, 80 Plus Bronze efficiency and come with a fully wired cable set.

Closer Look:

The basic package design used for the XFX Pro Series Core Edition power supplies is basically the same apart from a few minor changes that reflect the different power supply wattages and output currents. The theme is black with the background in satin and a grid of small gloss squares randomly covering different areas of the box. The front face of the box shows a gloss photograph of the power supply, large XFX logo, the power supply model and a set of smaller logos which include Japan Caps, Crossfire Ready, SLI Ready and 80 Plus Bronze

 

 

 

 

 

 

 

 

 

 

The only change on the front face of the XFX Pro Series Core Edition power supply boxes is the model number.

 

 

The rear face of the box explains the EasyRail technology used for the power (more on this later) and clearly shows the five year warranty.

 

The top face of the box explains some of the main features of the XFX Pro Series Core Edition power supply. The small circular yellow graphic in the top left hand corner is a true wattage guarantee which is exactly what it says, a guarantee that unlike some other power supplies, these units will deliver their rated wattage continuously at the more realistic working temperature of 50°C.

 

The only change on the top face of the box across the range is again the model number.

 

 

The bottom face of the box gives a list of other features, connector types and quantities along with a specification table and agency approval logos.

 

Obviously each power supply requires a different specification table as well as power supply model.

 

 

The XFX Pro Series Core Edition power supplies come in a box within a box.

 

Lift the lid and the user manual (same one across the range) sits in the center of its own cardboard tray. Remove the tray and power supply sits neatly in the center of the box, power cord hidden in the section on the right and the captive cable set hidden in the left hand section. The use of cardboard spacers top and bottom ensures the power supply is adequately protected from impact damage and should survive the rigours of most postal systems.

 

The power supply and full box contents which are a little sparse as there are no cable ties, velcro straps nor anti-vibration mounts. There is a user manual, power cord and mounting screws.

 

 

 

The XFX Pro Series Core Edition power supplies are well packaged but lack a few accessories that are often included with other high-end power supplies like cable ties. But it’s not the end of the world so let’s move on and have a closer look at the power supply.

Closer Look:

The XFX Pro Series Core Edition power supplies have retained the industrial look of their predecessors. The black satin paint finish is slightly textured and thankfully XFX have gone for a black fan this time around.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The rear face of Pro Series power supplies have the usual IEC mains input connector with a small rocker type mains on/off switch along with a silver XFX logo. The exhaust grill is made up of a grid of small square holes that occupies all the available unused space for maximum airflow. The front face of the Pro Series power supplies are black plastic mouldings bearing the XFX logo held in place with small black countersunk screws. The fact that the panel isn’t metal and uses a moulded lip on the cable exit port should virtually eliminate the possibility of cable damage.

 

 

The small cutout at the top of the side panel shows a small section of the internal fan bracket.

 

The side panels of the Pro Series power supplies all carry a different label, inverted on the opposite face that clearly displays the power supply's credentials.

 

 

The cooling fan grill is pressed out of the metal enclosure eliminating the need for a separate metal wire grill. The centre of the grill carries a silver XFX logo that is covered with a removable plastic scratch protector.

 

The bottom faces of the Pro Series power supplies all carry their own label to reflect the different electrical specifications of the range.

 

 

The XFX Pro Series Core Edition power supplies are all fully wired and the only difference across the series is the addition of a three SATA connector cable on the 850W unit.

 

The cooling fan on the Pro Series units isn’t mounted on the lid like many other units but instead uses a separate fan mounting bracket. The cooling fan is a 135mm unit from ADDA, model number ADN512UB-A90, and rated for 12VDC at 0.44A.

 

 

The printed circuit board on the 650W unit is at first glance identical across the range so either the same board is used across the range (unlikely) or the specification of some of the main components has been changed to reflect the different power requirements.

 

The two main capacitors differ in value on the 750W and 850W units and I noted different bridge rectifiers used on the primary side so I think it’s safe to assume the latter. The capacitors used, and as stated in the literature, are of good quality Japanese manufacture with the more welcome 105°C working temperature rating.

 

 

The XFX Pro Series Core Edition power supplies are well built units with a neatly laid out printed circuit boards. Heat sink size is minimal which reflects the high efficiency levels of an 80 Plus Bronze certified unit. Let’s move on and see how well they perform.

Specifications:

Review Sample: XFX Core Edition PRO650W Power Supply, Part Number P1650SNLB9

Review Sample: XFX Core Edition PRO750W Power Supply, Part Number P1750SNLB9.

Review Sample: XFX Core Edition PRO850W Power Supply, Part Number P1850SNLB9.

 

Ratings Tables:

 

 

 

 

 

 

 

 

 

 

 

XFX Core Edition PRO650W (P1650SNLB9.) Power Supply Specification Table
AC Input
90 – 264V     9 – 4.5A     47 – 63Hz
DC Output
+3V3
+5V
+12V
-12V
+5VSB
Maximum Load
25A
25A
53A
0.5A
3A
Maximum Combined
Wattage
150W
636W
6W
15W
650W

 

XFX Core Edition PRO750W (P1750SNLB9.) Power Supply Specification Table
AC Input
90 – 264V     10 – 5A     47 – 63Hz
DC Output
+3V3
+5V
+12V
-12V
+5VSB
Maximum Load
25A
25A
62A
0.5A
3A
Maximum Combined
Wattage
150W
744W
6W
15W
750W

 

XFX Core Edition PRO850W (P1850SNLB9.) Power Supply Specification Table
AC Input
90 – 264V     12 – 6A     47 – 63Hz
DC Output
+3V3
+5V
+12V
-12V
+5VSB
Maximum Load
25A
25A
70A
0.5A
3A
Maximum Combined
Wattage
150W
840W
6W
15W
850W

 

System Protection:

Protection features: Over power, over voltage, under voltage, short circuit, over current & over temperature. (No specific figures provided).

 

Safety & Agency Approvals:

Safety Approvals: cTUVus, TUV, CB & Semko.

EMC: CE, FCC & C-Tick.

Hazardous Materials: WEEE & RoHS.

 

Power Supply Physical Characteristics:

 

XFX Core Edition PRO650/750/850W (P1650/750/850SNLB9) Power Supply Physical Characteristics
Weight (inc. cables)
Length
Width
Height
6.2lbs/2.8kg
6.7in/170mm
5.9in/150mm
3.4in/86mm

 

Power Supply Connectors:

 

XFX Core Edition PRO650/750/850W (P1650/750/850SNLB9) Power Supply Connectors
Connector Type
Qty
650W
750W
850W
Motherboard 20/24-pin
1
1
1
EPS12V/ATX12V 4+4-pin
1
1
1
PCI-E 6-pin
2
2
2
PCI-E 6+2-pin
2
2
2
SATA Power 15-pin
8
8
11*
Peripheral 4-pin
7
7
7
FDD 4-pin
1
1
1

 

Power Supply Cable Lengths:

 

XFX Core Edition PRO650/750/850W (P1650/750/850SNLB9) Power Supply Cable Set
Cable Type
Cable Length/Connector Spacing’s
Qty
Captive
PSU > 23" > Motherboard 24-Pin
1
Captive
PSU > 24" > EPS12V/ATX12V 4+4-Pin
1
Captive
PSU > 23" > PCI-E 6+2-Pin
2
Captive
PSU > 23" > PCI-E 6-Pin
2
Captive
PSU > 16" > SATA > 6" > SATA > 6" > SATA > 6" > SATA
2
Captive
PSU > 16" > SATA > 6" > SATA > 6" > SATA (850W Only)*
1
Captive
PSU > 16" > Peripheral > 6" > Peripheral > 6" > Peripheral > 6" > Peripheral
1
Captive
PSU > 16" > Peripheral > 6" > Peripheral > 6" > Peripheral > 6" > FDD
1

*Three extra SATA connectors on the 850W variant are the only difference across the range.

 

Features:

Drawn from the user manual and packaging this information is common to all three power supplies.

**European customers must register their product on www.xfxforce.co.uk within 30 days of purchase to upgrade their standard 3 year warranty to a 5 year extended warranty.

Testing the PRO650W:

For more information on how we test our power supplies, please browse our testing methodology.

 

Short Circuit Protection:

I short circuited the 3V3, 5V0 and the 12V rail(s) in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second and resumed normal operation. Although listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go to plan.

 

DC Output Voltage Load Regulation:

 

Mains Input Voltage 110VAC

 

 

 

 

 

 

 

 

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.37
5V0
5.07
+12V
12.15
-12V
11.82
5VSB
5.10
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.14
10.49
3.34
3.135 – 3.465
Pass
+5V
4.79
24.19
5.05
4.75 – 5.25
Pass
+12V
7.65
92.72
12.12
11.4 – 12.6
Pass
-12V
0.34
3.99
11.74
10.8 – 13.2
Pass
+5VSB
2.12
10.43
4.92
4.75 – 5.25
Pass
Total PSU DC Loading = 142W (22% of Rated Maximum Output Power)

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.31
27.26
3.28
3.135 – 3.465
Pass
+5V
9.68
48.50
5.01
4.75 – 5.25
Pass
+12V
21.32
257.3
12.07
11.4 – 12.6
Pass
-12V
0.35
4.13
11.81
10.8 – 13.2
Pass
+5VSB
2.12
10.32
4.87
4.75 – 5.25
Pass
Total PSU DC Loading = 347W (53% of Rated Maximum Output Power)

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
13.16
42.51
3.23
3.135 – 3.465
Pass
+5V
14.82
73.51
4.96
4.75 – 5.25
Pass
+12V
42.28
507.80
12.01
11.4 – 12.6
Pass
-12V
0.36
4.28
11.89
10.8 – 13.2
Pass
+5VSB
2.11
10.15
4.81
4.75 – 5.25
Pass
Total PSU DC Loading = 638W (98% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.36
5V0
5.07
+12V
12.15
-12V
11.81
5VSB
5.10
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.19
10.65
3.34
3.135 – 3.465
Pass
+5V
4.79
24.19
5.05
4.75 – 5.25
Pass
+12V
7.63
92.47
12.12
11.4 – 12.6
Pass
-12V
0.34
3.99
11.74
10.8 – 13.2
Pass
+5VSB
2.12
10.45
4.93
4.75 – 5.25
Pass
Total PSU DC Loading = 142W (22% of Rated Maximum Output Power)

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.33
27.32
3.28
3.135 – 3.465
Pass
+5V
9.73
48.75
5.01
4.75 – 5.25
Pass
+12V
21.27
256.73
12.07
11.4 – 12.6
Pass
-12V
0.34
4.01
11.80
10.8 – 13.2
Pass
+5VSB
10.32
10.32
4.87
4.75 – 5.25
Pass
Total PSU DC Loading = 347W (53% of Rated Maximum Output Power)

 

Core Edition PRO650W ( P1650SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
12.96
41.86
3.23
3.135 – 3.465
Pass
+5V
14.72
73.01
4.96
4.75 – 5.25
Pass
+12V
42.33
508.40
12.01
11.4 – 12.6
Pass
-12V
0.35
4.15
11.87
10.8 – 13.2
Pass
+5VSB
2.12
10.26
4.84
4.75 – 5.25
Pass
Total PSU DC Loading = 638W (98% of Rated Maximum Output Power)

 

The PRO650W produced a decent set of results in this section. The 3V3 and 5V0 rails dropped a little below their optimum levels but still, like the other rails, remained well within the limits set down by the ATX12V V2.2 specification. No problems here so let's move on.

Testing the PRO750W:

For more information on how we test our power supplies, please browse our testing methodology.

 

Short Circuit Protection:

I short circuited the 3V3, 5V0 and the 12V rail(s) in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second, resumed normal operation. Although listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go to plan.

 

DC Output Voltage Load Regulation:

 

Mains Input Voltage 110VAC

 

 

 

 

 

 

 

 

 

Core Edition PRO750W ( P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.37
5V0
5.06
+12V
12.17
-12V
11.78
5VSB
5.10
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.10
10.32
3.33
3.135 – 3.465
Pass
+5V
4.68
23.59
5.04
4.75 – 5.25
Pass
+12V
7.66
92.92
12.13
11.4 – 12.6
Pass
-12V
0.34
3.99
11.74
10.8 – 13.2
Pass
+5VSB
2.12
10.30
4.86
4.75 – 5.25
Pass
Total PSU DC Loading = 141W (19% of Rated Maximum Output Power)

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.32
27.20
3.27
3.135 – 3.465
Pass
+5V
9.70
48.50
5.00
4.75 – 5.25
Pass
+12V
24.65
294.15
12.08
11.4 – 12.6
Pass
-12V
0.35
4.12
11.78
10.8 – 13.2
Pass
+5VSB
2.12
10.24
4.83
4.75 – 5.25
Pass
Total PSU DC Loading = 384W (51% of Rated Maximum Output Power)

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
12.95
41.57
3.21
3.135 – 3.465
Pass
+5V
14.78
73.01
4.94
4.75 – 5.25
Pass
+12V
51.89
623.71
12.02
11.4 – 12.6
Pass
-12V
0.35
4.13
11.80
10.8 – 13.2
Pass
+5VSB
2.11
10.08
4.78
4.75 – 5.25
Pass
Total PSU DC Loading = 752W (100% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.36
5V0
5.06
+12V
12.16
-12V
11.78
5VSB
5.10
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.19
10.65
3.34
3.135 – 3.465
Pass
+5V
4.78
24.09
5.04
4.75 – 5.25
Pass
+12V
7.68
93.16
12.13
11.4 – 12.6
Pass
-12V
0.34
3.98
11.72
10.8 – 13.2
Pass
+5VSB
2.12
10.34
4.88
4.75 – 5.25
Pass
Total PSU DC Loading = 142W (19% of Rated Maximum Output Power)

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.23
26.99
3.28
3.135 – 3.465
Pass
+5V
9.60
48.00
5.00
4.75 – 5.25
Pass
+12V
24.52
296.20
12.08
11.4 – 12.6
Pass
-12V
0.35
4.13
11.80
10.8 – 13.2
Pass
+5VSB
2.12
10.24
4.83
4.75 – 5.25
Pass
Total PSU DC Loading = 386W (51% of Rated Maximum Output Power)

 

Core Edition PRO750W (P1750SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
13.20
42.50
3.22
3.135 – 3.465
Pass
+5V
14.57
72.12
4.95
4.75 – 5.25
Pass
+12V
52.36
634.60
12.12
11.4 – 12.6
Pass
-12V
0.35
4.15
11.86
10.8 – 13.2
Pass
+5VSB
2.11
10.11
4.79
4.75 – 5.25
Pass
Total PSU DC Loading = 763W (102% of Rated Maximum Output Power)

 

The PRO750W produced a decent set of results in this section. The 3V3 and 5V0 rails dropped a little below their optimum levels but still, like the other rails, remained well within the limits set down by the ATX12V V2.2 specification. No problems here so let's move on.

Testing the PRO850W:

For more information on how we test our power supplies, please browse our testing methodology.

 

Short Circuit Protection:

I short circuited the 3V3, 5V0 and the 12V rail(s) in turn. The power supply did shut down, and once the short was removed and the unit switched off for at least one second, resumed normal operation. Although listed here at the beginning of the testing section, I tend to leave this test until the very end, in case it doesn't quite go to plan.

 

DC Output Voltage Load Regulation:

 

Mains Input Voltage 110VAC

 

 

 

 

 

 

 

 

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.36
5V0
5.03
+12V
12.13
-12V
11.76
5VSB
5.13
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Core Edition PRO850W (P1-850S-CAB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.20
10.69
3.34
3.135 – 3.465
Pass
+5V
4.76
23.85
5.01
4.75 – 5.25
Pass
+12V
10.19
123.30
12.10
11.4 – 12.6
Pass
-12V
0.34
3.99
11.75
10.8 – 13.2
Pass
+5VSB
2.13
10.56
4.96
4.75 – 5.25
Pass
Total PSU DC Loading = 172W (20% of Rated Maximum Output Power)

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.34
27.35
3.28
3.135 – 3.465
Pass
+5V
9.67
48.16
4.98
4.75 – 5.25
Pass
+12V
26.53
321.81
12.13
11.4 – 12.6
Pass
-12V
0.34
4.01
11.80
10.8 – 13.2
Pass
+5VSB
2.12
10.32
4.87
4.75 – 5.25
Pass
Total PSU DC Loading = 411W (48% of Rated Maximum Output Power)

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 110VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
13.10
42.44
3.24
3.135 – 3.465
Pass
+5V
14.52
71.44
4.92
4.75 – 5.25
Pass
+12V
59.57
714.80
12.00
11.4 – 12.6
Pass
-12V
0.35
4.15
11.85
10.8 – 13.2
Pass
+5VSB
2.10
10.10
4.81
4.75 – 5.25
Pass
Total PSU DC Loading = 843W (99% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU DC Rail
Measured Voltage(V)
3V3
3.36
5V0
5.04
+12V
12.13
-12V
11.77
5VSB
5.13
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
3.12
10.39
3.33
3.135 – 3.465
Pass
+5V
4.73
23.74
5.02
4.75 – 5.25
Pass
+12V
10.18
123.18
12.10
11.4 – 12.6
Pass
-12V
0.34
3.99
11.74
10.8 – 13.2
Pass
+5VSB
2.13
10.54
4.95
4.75 – 5.25
Pass
Total PSU DC Loading = 172W (20% of Rated Maximum Output Power)

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
8.35
27.47
3.29
3.135 – 3.465
Pass
+5V
9.67
48.16
4.98
4.75 – 5.25
Pass
+12V
26.62
320.77
12.05
11.4 – 12.6
Pass
-12V
0.34
4.01
11.80
10.8 – 13.2
Pass
+5VSB
2.12
10.34
4.88
4.75 – 5.25
Pass
Total PSU DC Loading = 411W (48% of Rated Maximum Output Power)

 

Core Edition PRO850W (P1850SNLB9) Power Supply DC Output Voltage Load Regulation
Supply = 230VAC/50Hz
PSU
DC Rail
Rail Loading Amps (A)
Rail Loading Watts (W)
Measured Voltage (V)
ATX12V V2.2 Limits (V)
Pass/Fail
+3V3
13.07
42.35
3.24
3.135 – 3.465
Pass
+5V
14.78
72.72
4.92
4.75 – 5.25
Pass
+12V
58.89
706.10
11.99
11.4 – 12.6
Pass
-12V
0.35
4.15
11.86
10.8 – 13.2
Pass
+5VSB
2.11
10.13
4.80
4.75 – 5.25
Pass
Total PSU DC Loading = 835W (98% of Rated Maximum Output Power)

 

The PRO850W produced a decent set of results in this section. The 3V3 and 5V0 rails dropped a little below their optimum levels but still, like the other rails, remained well within the limits set down by the ATX12V V2.2 specification. No problems here so let's move on.

Testing the PRO650W:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The XFX PRO650W didn’t quite hit the efficiency levels of 82%, 85% and 82% at 20%, 50% and 100% DC loading required by its 80 Plus Bronze certification following the OCC power supply testing methodology at 110VAC. I can’t exactly replicate the 80 Plus testing protocols so it’s unfair to reach any valid conclusion in this respect. The power supply did however produce a set of efficiency results on a par with other units I’ve tested and 81%, 82% and 79% efficiency at 22%, 53% and 98% DC loading isn’t too shabby. Power factor is never a problem with the 80 Plus Bronze certification requiring >0.9 at 50% DC loading so 0.98 easily hits the mark.

 

 

The XFX PRO650W performed a little better when supplied from a 230VAC supply which is usually the case. Efficiency levels of 82%, 84% and 82% at 22%, 53% and 98% DC loading are a little higher with a slightly lower power factor value of 0.97 at 53% DC loading.

 

AC Ripple On DC Outputs:

 

I have consistently found the AC ripple levels on the DC rails to be more or less equal with an 110VAC or 230VAC mains supply. The results given below are for 230VAC only but I will continue to check the levels at 110VAC during testing and publish them below if there are any significant differences.

 

AC ripple/noise on the +3V3 rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +5V0 rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +12V rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the -12V rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +5VSB rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

Core Edition PRO650W (P1650SNLB9) Power Supply AC Ripple/Noise
Supply = 230VAC/50Hz DC Loading = 638W
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
7
10
10
14
9
Pass/Fail
Pass
Pass
Pass
Pass
Pass

The XFX PRO650W power supply gave some of the lowest results I've seen in this section and they are really excellent. Absolutely no problems here so let's move on.

Testing the PRO750W:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The XFX PRO750W didn’t quite hit the efficiency levels of 82%, 85% and 82% at 20%, 50% and 100% DC loading required by its 80 Plus Bronze certification following the OCC power supply testing methodology at 110VAC. I can’t exactly replicate the 80 Plus testing protocols so it’s unfair to reach any valid conclusion in this respect. The power supply did however produce a set of efficiency results on a par with other units I’ve tested and 81%, 83% and 78% efficiency at 19%, 51% and 100% DC loading isn’t too shabby. Power factor is never a problem with the 80 Plus Bronze certification requiring >0.9 at 50% DC loading so 0.98 easily hits the mark.

 

 

The XFX PRO750W performed a little better when supplied from a 230VAC supply which is usually the case. Efficiency levels of 81%, 84% and 82% at 19%, 51% and 102% DC loading are a little higher with a slightly lower power factor value of 0.97 at 53% DC loading.

 

AC Ripple On DC Outputs:

 

I have consistently found the AC ripple levels on the DC rails to be more or less equal with an 110VAC or 230VAC mains supply. The results given below are for 230VAC only but I will continue to check the levels at 110VAC during testing and publish them below if there are any significant differences.

 

AC ripple/noise on the +3V3 rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +5V0 rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +12V rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the -12V rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +5VSB rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

Core Edition PRO750W (P1750SNLB9) Power Supply AC Ripple/Noise
Supply = 230VAC/50Hz DC Loading = 763W
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
12
11
10
17
18
Pass/Fail
Pass
Pass
Pass
Pass
Pass

The XFX PRO750W power supply gave some of the lowest results I've seen in this section and they are really excellent. Absolutely no problems here so let's move on.

Testing the PRO850W:

Efficiency and Power Factor:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The XFX PRO850W didn’t quite hit the efficiency levels of 82%, 85% and 82% at 20%, 50% and 100% DC loading required by its 80 Plus Bronze certification following the OCC power supply testing methodology at 110VAC. I can’t exactly replicate the 80 Plus testing protocols so it’s unfair to reach any valid conclusion in this respect. The power supply did however produce a set of efficiency results on a par with other units I’ve tested and 82%, 84% and 79% efficiency at 20%, 48% and 99% DC loading isn’t too shabby and makes the PRO850W marginally the most efficient of the bunch following the OCC testing methodology. Power factor is never a problem with the 80 Plus Bronze certification requiring >0.9 at 50% DC loading so 0.98 easily hits the mark.

 

 

The XFX PRO850W performed a little better when supplied from a 230VAC supply which is usually the case. Efficiency levels of 82%, 85% and 81% at 22%, 53% and 98% DC loading are a little higher with a slightly lower power factor value of 0.97 at 53% DC loading.

 

AC Ripple On DC Outputs:

 

I have consistently found the AC ripple levels on the DC rails to be more or less equal with an 110VAC or 230VAC mains supply. The results given below are for 230VAC only but I will continue to check the levels at 110VAC during testing and publish them below if there are any significant differences.

 

AC ripple/noise on the +3V3 rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +5V0 rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +12V rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the -12V rail at 230VAC

Oscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

AC ripple/noise on the +5VSB rail at 230VAC

OOscilloscope settings: Amplitude = 2mv/div, Timebase = 5uS/div

 

Core Edition PRO850W (P1850SNLB9) Power Supply AC Ripple/Noise
Supply = 230VAC/50Hz DC Loading = 835W
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
9
8
9
11
8
Pass/Fail
Pass
Pass
Pass
Pass
Pass

The XFX PRO850W power supply gave some of the lowest results I've seen in this section and they are really excellent. Absolutely no problems here so let's move on.

Testing:

Temperature, Noise Levels and Fan Speeds:

I am not going to give a pass or fail in this section, as the ATX12V V2.2 does not really have any references on which to base a decision.

Temperatures are purely for information only, as there are too many variables involved when installed in a case, which, by the way, it wasn't. Ambient temperature, processor cooling efficiency and case cooling fans all play their part on the temperature of the air entering the power supply, and consequently the temperature of the air leaving it. No valid conclusions can be made from this test.

 

 

 

 

 

 

 

 

 

 

 

 

 

Core Edition PRO650W (P1650SNLB9) Power Supply Temperature & Fan Speeds
Supply = 110VAC/230VAC
DC Loading(W)
Temp In (°C)
Temp Out (°C)
Δ Temp (°C)
Fan Speed (RPM)
0
N/A
N/A
N/A
982/978
142/142
25.0/24.0
29.7/30.9
4.7/6.9
989/993
347/347
23.7/24.1
34.3/32.3
10.6/8.2
1403/1194
638/638
23.6/23.0
36.9/34.2
13.3/11.2
2172/2170

 

Core Edition PRO750W (P1750SNLB9) Power Supply Temperature & Fan Speeds
Supply = 110VAC/230VAC
DC Loading(W)
Temp In (°C)
Temp Out (°C)
Δ Temp (°C)
Fan Speed (RPM)
0
N/A
N/A
N/A
988/987
141/142
24.0/23.9
32.2/32.4
8.2/8.5
991/994
384/386
24.2/24.0
40.1/38.3
15.9/14.3
1110/1112
752/763
23.8/23.0
41.0/35.4
17.2/12.4
2160/2163

 

Core Edition PRO850W (P1850SNLB9) Power Supply Temperature & Fan Speeds
Supply = 110VAC/230VAC
DC Loading(W)
Temp In (°C)
Temp Out (°C)
Δ Temp (°C)
Fan Speed (RPM)
0
N/A
N/A
N/A
953/950
172/172
21.0/22.2
26.6/26.8
5.6/4.6
962/963
411/411
23.5/22.0
35.0/30.3
11.5/8.3
978/974
843/835
23.2/22.9
39.4/39.0
16.2/16.1
2071/2133

 

The temperature results of the XFX Pro Series Core Edition power supplies produced nothing remarkable and are typical of power supplies in this class. Fan noise remained low up to approximately 50% DC loading but noticeably louder when hitting 2000 RPM plus across the board at full load.

Conclusions:

 

Price Per the Watt:

Power Supply XFX Pro Series Core Edition 650W at $89.00 = $0.14/Watt (02-2011)
Power Supply XFX Pro Series Core Edition 750W at $109.00 = $0.15/Watt (02-2011)
Power Supply XFX Pro Series Core Edition 850W at $129.00 = $0.20/Watt (02-2011)

 

I had intended to write a separate conclusion for each power supply but the XFX Pro Series Core Edition power supplies have performed similarly throughout testing so I don’t think it necessary.

XFX place great importance (throughout the packaging and their literature) on the EasyRail technology used in the Pro Series power supplies. What is EasyRail technology? It’s marketing speak for a single 12V rail and the added benefits of no load balancing and the possibility of locked in or lost power that can sometimes result on multi-12V railed power supplies.

The XFX Pro Series Core Edition power supplies performed very well across the range. The DC voltage load regulation was excellent from 20% to 100% DC loading and in combination with very low AC ripple/noise levels means excellent DC quality on all rails on all three power supplies. The 3V3 and 5V0 rails dipped a little lower than I would have liked but they still remained well within the limits set down by the ATX12V V2.2 specification and won’t prove to be a problem when the biggest dip below ideal rail voltage was only 0.09V. Efficiency levels across the range are acceptable with the PRO850W proving marginally more efficient than the others and efficiencies in the low to middle eighties are on a par with other units in this class.

The only difference across the range is an extra three SATA connectors on the PRO850W so power supply selection at the build stage is important and is really graphic card dependent although any of the three power supplies could power a dual graphics configuration on a fairly standard PC. If the intended build involves powerful graphics cards, multiple hard disk drives, cooling fans, etc and a certain amount of overclocking, the PRO750W or PRO850W would be a more sensible choice.

The XFX Pro series power supplies are, as you’d expect, physically alike across the range and with good build quality and their unique styling will probably appeal to many enthusiasts. If you are in the market for a high quality wired power supply, at a fair price, then I highly recommend any of the XFX Pro Series Core Edition units. I have no hesitation in awarding all three XFX Pro Series Core Edition power supplies the OCC Gold award.

 

Pros:

Cons: