Facebook
Twitter
YouTube
RSS FeedsXFX XPS-850W Power Supply Review
paulktreg - September 14, 2009» Discuss this article (9)
Testing:
For more information on how we test our power supplies, please browse our testing methodology.
Electrical Safety:
|
Electrical Safety Test Class 1
|
|
|
Manufacturer/Model
|
Pass/Fail
|
|
XFX Black Edition 850W
|
Pass
|
Short Circuit Protection:
I short circuited the 3V3, 5V0 and the 12V rail 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
|
XFX Black Edition 850W
|
|
|
DC Output Voltage Load Regulation
|
|
|
AC Supply = 110V / DC Load = 0W
|
|
|
PSU DC Rail
|
Measured Voltage(V)
|
|
3V3
|
3.40
|
|
5V0
|
5.15
|
|
+12V
|
12.22
|
|
-12V
|
-12.00
|
|
5VSB
|
5.03
|
|
XFX Black Edition 850W
|
|||||
|
DC Output Voltage Load Regulation
|
|||||
|
110VAC - Total Load at 175W which is 21% of Rated Maximum Output Power
|
|||||
|
PSU
DC Rail
|
Measured
Voltage(V)
|
Measured
Current (A)
|
Load Power
(W)
|
ATX12V V Limits
(V)
|
Pass/Fail
|
|
+3V3
|
3.38
|
3.22
|
10.88
|
3.135 – 3.465
|
Pass
|
|
+5V
|
5.14
|
4.59
|
23.59
|
4.75 – 5.25
|
Pass
|
|
+12V
|
12.21
|
10.30
|
125.76
|
11.4 – 12.6
|
Pass
|
|
-12V
|
11.90
|
0.35
|
4.16
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
4.94
|
2.06
|
10.18
|
4.75 – 5.25
|
Pass
|
|
Total Power Supply Loading
|
175W
|
|
|||
|
XFX Black Edition 850W
|
|||||
|
DC Output Voltage Load Regulation
|
|||||
|
110VAC - Total Load at 419W which is 49% of Rated Maximum Output Power
|
|||||
|
PSU
DC Rail
|
Measured
Voltage(V)
|
Measured
Current (A)
|
Load Power
(W)
|
ATX12V V Limits
(V)
|
Pass/Fail
|
|
+3V3
|
3.37
|
8.36
|
28.17
|
3.135 – 3.465
|
Pass
|
|
+5V
|
5.14
|
8.88
|
45.64
|
4.75 – 5.25
|
Pass
|
|
+12V
|
12.19
|
27.13
|
330.71
|
11.4 – 12.6
|
Pass
|
|
-12V
|
12.06
|
0.35
|
4.22
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
4.94
|
2.06
|
10.18
|
4.75 – 5.25
|
Pass
|
|
Total Power Supply Loading
|
419W
|
|
|||
|
XFX Black Edition 850W
|
|||||
|
DC Output Voltage Load Regulation
|
|||||
|
110VAC - Total Load at 830W which is 98% of Rated Maximum Output Power
|
|||||
|
PSU
DC Rail
|
Measured
Voltage(V)
|
Measured
Current (A)
|
Load Power
(W)
|
ATX12V V Limits
(V)
|
Pass/Fail
|
|
+3V3
|
3.36
|
12.96
|
43.55
|
3.135 – 3.465
|
Pass
|
|
+5V
|
5.13
|
13.20
|
67.72
|
4.75 – 5.25
|
Pass
|
|
+12V
|
12.17
|
57.82
|
703.67
|
11.4 – 12.6
|
Pass
|
|
-12V
|
12.28
|
0.36
|
4.42
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
4.93
|
2.06
|
10.16
|
4.75 – 5.25
|
Pass
|
|
Total Power Supply Loading
|
830W
|
|
|||
Mains Input Voltage 230VAC
|
XFX Black Edition 850W
|
|
|
DC Output Voltage Load Regulation
|
|
|
AC Supply = 230V / DC Load = 0W
|
|
|
PSU DC Rail
|
Measured Voltage(V)
|
|
3V3
|
3.40
|
|
5V0
|
5.15
|
|
+12V
|
12.21
|
|
-12V
|
-12.00
|
|
5VSB
|
5.03
|
|
XFX Black Edition 850W
|
|||||
|
DC Output Voltage Load Regulation
|
|||||
|
230VAC - Total Load at 174W which is 20% of Rated Maximum Output Power
|
|||||
|
PSU
DC Rail
|
Measured
Voltage(V)
|
Measured
Current (A)
|
Load Power
(W)
|
ATX12V V Limits
(V)
|
Pass/Fail
|
|
+3V3
|
3.37
|
3.20
|
10.78
|
3.135 – 3.465
|
Pass
|
|
+5V
|
5.13
|
4.63
|
23.75
|
4.75 – 5.25
|
Pass
|
|
+12V
|
12.20
|
10.29
|
125.53
|
11.4 – 12.6
|
Pass
|
|
-12V
|
11.91
|
0.35
|
4.17
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
4.94
|
2.06
|
10.18
|
4.75 – 5.25
|
Pass
|
|
Total Power Supply Loading
|
174W
|
|
|||
|
XFX Black Edition 850W
|
|||||
|
DC Output Voltage Load Regulation
|
|||||
|
230VAC - Total Load at 420W which is 49% of Rated Maximum Output Power
|
|||||
|
PSU
DC Rail
|
Measured
Voltage(V)
|
Measured
Current (A)
|
Load Power
(W)
|
ATX12V V Limits
(V)
|
Pass/Fail
|
|
+3V3
|
3.37
|
8.37
|
28.21
|
3.135 – 3.465
|
Pass
|
|
+5V
|
5.15
|
9.15
|
47.12
|
4.75 – 5.25
|
Pass
|
|
+12V
|
12.20
|
27.09
|
330.50
|
11.4 – 12.6
|
Pass
|
|
-12V
|
12.06
|
0.35
|
4.22
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
4.94
|
2.06
|
10.18
|
4.75 – 5.25
|
Pass
|
|
Total Power Supply Loading
|
420W
|
|
|||
|
XFX Black Edition 850W
|
|||||
|
DC Output Voltage Load Regulation
|
|||||
|
230VAC - Total Load at 830W which is 98% of Rated Maximum Output Power
|
|||||
|
PSU
DC Rail
|
Measured
Voltage(V)
|
Measured
Current (A)
|
Load Power
(W)
|
ATX12V V Limits
(V)
|
Pass/Fail
|
|
+3V3
|
3.36
|
12.84
|
43.14
|
3.135 – 3.465
|
Pass
|
|
+5V
|
5.14
|
12.89
|
66.25
|
4.75 – 5.25
|
Pass
|
|
+12V
|
12.18
|
57.99
|
706.32
|
11.4 – 12.6
|
Pass
|
|
-12V
|
12.27
|
0.36
|
4.42
|
10.8 – 13.2
|
Pass
|
|
+5VSB
|
4.92
|
2.06
|
10.13
|
4.75 – 5.25
|
Pass
|
|
Total Power Supply Loading
|
830W
|
|
|||
The XFX Black Edition 850W power supply gave an excellent set of results for DC voltage load regulation. The rail voltages are all slightly elevated, but still within the ATX12V V2.2 specification. What was most impressive was a drop of only 0.03~0.05V on the 12V rail as the load went from zero to almost 60A. No problems here, so let's move on.
