Corsair HX1050 1050W Power Supply Review

paulktreg - 2011-08-10 12:31:32 in Power Supplies
Category: Power Supplies
Reviewed by: paulktreg   
Reviewed on: December 18, 2011
Price: $209.99

Introduction:

Corsair, founded in 1994, will probably be familiar to most PC enthusiasts. Corsair products are now sold in over sixty countries worldwide, primarily through leading distributors and retailers. High performance memory, solid state drives, PC enclosures, power supplies and processor cooling solutions are just some of the products now offered under the Corsair name.

The Corsair power supply range is extensive, from the budget orientated CX Builder Series to the high end AX Professional Series for the enthusiast with the GS, TX and HX series filling the gap. Corsair have been updating and improving their power supply range of late and this time around OCC will be putting the replacement for the HX1000 through its paces, the HX1050 1050W Professional Series power supply.

The Corsair HX Professional Series power supplies are designed with the enthusiast and gamer in mind. The use of high quality components ensure stable, clean and reliable voltages that are essential for high end gaming machines with the added bonus of a modular design, realistic 50°C working temperature and a welcome 7 year warranty. Let's have a closer look and see how well it performs.

Closer Look:

The HX1050 packaging follows the theme used throughout the entire Corsair power supply range. The box is on the large side with a photograph of the power supply fan grill and model number on the front of the box with all the technical details on the rear. The front and rear faces of the box list a few of the major features and some of the technology used in the design of power supply in several different languages that includes the modular design, the use of DC to DC convertors, high quality components and a maximum efficiency of 88%.

 

 

 

 

 

 

 

 

 

 

 

Inside the box is another plain brown cardboard box bearing the Corsair logo.

 

The box contents are neatly packaged with the power supply well protected inside a black foam case and black felt drawstring bag. The box contents include a modular cable bag, power cord, user manual and a small sealed plastic bag with ten cable ties, case badge and power supply mounting screws.

 

 

 

The Corsair HX1050 is very well packaged with a decent set of accessories. No problems here, so let's move on.

Closer Look:

The Corsair HX1050 power supply casing with its pressed parallel lines, slightly textured matt black paint finish and internal black gloss cooling fan grill certainly looks the part.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The rear panel hexagonal holed exhaust grill occupies all the available space around the IEC mains input socket and a large mains on/off rocker switch. The modular cable connector panel on the front face is colour coded and labeled to avoid confusion at the wiring stage, blue for PCI-E/CPU and black for peripherals. The captive cable set, fully sleeved, leaves the power supply via a plastic lined port to prevent cable damage from bare metal edges.

The two side panels carry identical labels, one side inverted, that clearly show the model number alongside the Corsair logo. The fan grill is internally mounted and carries a white Corsair logo at its centre. The bottom of the power supply is used to show a comprehensive specification label.

 

 

 

The captive cable set consists of a 20+4 pin motherboard connector, one 4+4 pin ATX12V/EPS12V connector and two 6+2 pin PCI-E connectors. The large modular cable set will provide enough connector options for most users. The modular 4+4 pin ATX12V/EPS12v and PCI-E cables are of the conventional round sleeved design whilst the peripheral cables use flat black ribbon cable that does make them a little easier to route at the build stage.

 

 

The fan of choice this time is a quality Yate Loon dual ball bearing D14BH-12 rated at 12VDC/0.7A. A quick look at the specification for this fan shows an impressive 140CFM air flow but with a maximum 2800RPM and a rather loud 48.5dB noise level so let's hope it's throttled back a little. A clear plastic baffle is fitted immediately behind the fan to direct the air flow where it's needed.

 

The internal layout is neat and the printed circuit board, although a little cluttered and untidy in places is no different to many other power supplies in its class. The two primary capacitors are by Panasonic and on the secondary Nippon Chemi-Con, both with the more welcome working temperature of 105°C.

 

The Corsair HX1050 is very well packaged with a good set of accessories and on the outside it looks like a "professional" unit with excellent build quality. It's claimed use of high quality Japanese capacitors holds true and internally it looks very much like other power supplies in its class. No problems so far, so let's move on.

Specification:

 

Review Sample: Corsair HX1050 1050W Power Supply, Part Number CMPSU-1050HX.

 

Ratings Table:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Corsair HX1050 1050W (CMPSU-1050HX) Power Supply Specification Table
AC Input
100V-240V     13A-7.5A     50Hz-60Hz
DC Output
+3V3
+5V
+12V
-12V
+5VSB
Maximum Load
30A
30A
87.5A
0.8A
3.5A
Maximum Combined Wattage
180W
1050W
9.6W
17.5W
1050W

 

System Protection:

 

Corsair HX1050 1050W (CMPSU-1050HX) System Protection
Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection
provide complete component safety.

 

Safety & Agency Approvals:

 

Corsair HX1050 1050W (CMPSU-1050HX) EMI & Safety
Safety Approvals
UL, CUL, CE, CB, FCC Class B, TUV, CCC & C-tick.

 

Power Supply Physical Characteristics:

 

Corsair HX1050 1050W (CMPSU-1050HX) Physical & Environmental
Length
Width
Height
7.1in/180mm
5.9in/150mm
3.4in/86mm
Operating Temperature: 50°C.
Mean Time Before Failure (MTBF): 100,000 hours.

 

Power Supply Connectors:

 

Corsair HX1050 1050W (CMPSU-1050HX) Power Supply Connectors
Connector Type
Qty
20+4 Pin Motherboard
1
EPS12V/ATX12V 4+4 Pin
2
PCI-E 6+2 Pin
6
SATA Power
12
Peripheral 4 Pin
12
FDD 4 Pin
2

 

Power Supply Cable Lengths:

 

Corsair HX1050 1050W (CMPSU-1050HX) Power Supply Connectors
Cable Type
Cable Length/Connector Spacing (± 1")
Qty
Captive
PSU > 24" > 20+4 Pin Motherboard
1
Captive
PSU > 24" > EPS12V/ATX12V 4+4 Pin
1
Captive
PSU > 24" > PCI-E 6+2 Pin
2
Modular
PSU > 24" > EPS12V/ATX12V 4+4 Pin
1
Modular
PSU > 24" > PCI-E 6+2 Pin
4
Modular
PSU > 16" > SATA > 6" > SATA > 6" > SATA > 6" > SATA
3
Modular
PSU > 16" > Peripheral > 6" > Peripheral > 6" > Peripheral > 6" > Peripheral
3
Adapter
Peripheral 4 Pin > 4" > FDD 4 Pin
2

 

Features:

 

 

 

All information courtesy of Corsair @ http://www.corsair.com/power-supply-units/professional-series-power-supply-units/professional-series-hx1050-80plus-silver-certified-modular-power-supply.html

Testing:

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

Throughout the tables all passes will be highlighted with green text and failures in red.

 

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:

In an ideal world the ATX power supply, or any other for that matter, should maintain its DC rails at a constant voltage but this is very difficult to achieve due to variations in the AC mains supply and changing DC load levels. The ATX12V V2.2 specification limits for this variation, expressed as a percentage, either side of the ideal voltage are given in the table below.

 

 

 

 

 

 

 

PSU Rail
Range
Minimum
Nominal
Maximum
+3V3
±5%
+3.14V
+3.30V
+3.47V
+5V
±5%
+4.75V
+5.00V
+5.25V
+12V
±5%*
+11.40V
+12.00V
+12.60V
-12V
±10%
-10.80V
-12.00V
-13.20V
+5VSB
±5%
+4.75V
+5.00V
+5.25V

 

*The +12V rail is permitted to go to ±10% at its rated maximum DC load.

There is no unit associated with voltage regulation, it is a simple ratio expressed as a percentage.

Voltage regulation VR= ([V no load – V full load] / V full load) x 100%

This equation is used to measure the voltage regulation of a simple single rail power supply but measuring the voltage regulation of the ATX power supply and the difference from the specified rail voltage will require a slightly different tack.

ATX Power Supply regulation = ([V measured - V specified] / V measured) x 100%

This will give the difference as a percentage from the specified rail voltage, +3.3V, +5V, +12V, etc.

There will be very few, if any, power supply failures in this section. The switched mode power supply is very good at maintaining its rail(s) at the correct voltage; they are constantly monitored and any changes are instantly fed back to the control circuitry and the necessary adjustments made to correct any error. So why test? The tighter the regulation the better, ±5% is acceptable, ±3% is very good and ±2% is excellent and the quality of the regulation is a useful indicator of the power supply’s overall quality.

 

Mains Input Voltage 110VAC

 

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 117VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
0
3.34
3.3V±5%
+1.2%
+5V
0
5.07
5.0V±5%
+1.4%
+12V
0
12.18
12.0V±5%
+1.5%
-12V
0
12.36
12.0V±10%
+3.0%
+5VSB
0
5.06
5.0V±5%
+1.2%
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 115VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
3.16A
3.32V
3.3V±5%
+0.6%
+5V
4.77A
5.05V
5.0V±5%
+1.0%
+12V
15.43A
12.14V
12.0V±5%
+1.2%
-12V
0.36A
11.95V
12.0V±10%
-0.4%
+5VSB
2.06A
4.94V
5.0V±5%
-1.2%
Total PSU DC Loading = 237W (22.5% of Rated Maximum Output Power)

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 113VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
8.01A
3.29V
3.3V±5%
-0.3%
+5V
9.45A
5.01V
5.0V±5%
+0.2%
+12V
37.10A
12.07V
12.0V±5%
+0.6%
-12V
0.35A
11.97V
12.0V±10%
-0.3%
+5VSB
1.99A
4.89V
5.0V±5%
-2.2%
Total PSU DC Loading = 535W (51% of Rated Maximum Output Power)

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 107VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
13.40A
3.25V
3.3V±5%
-1.5%
+5V
15.04A
4.95V
5.0V±5%
-1.0%
+12V
78.94A
12.01V
12.0V±5%
+0.1%
-12V
0.36A
11.92V
12.0V±10%
-0.7%
+5VSB
2.02A
4.85V
5.0V±5%
-3.0%
Total PSU DC Loading = 1080W (103% of Rated Maximum Output Power)

 

Mains Input Voltage 230VAC

 

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 245VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
0
3.34V
3.3V±5%
+1.2%
+5V
0
5.07V
5.0V±5%
+1.4%
+12V
0
12.18V
12.0V±5%
+1.5%
-12V
0
12.36V
12.0V±10%
+3.0%
+5VSB
0
5.06V
5.0V±5%
+1.2%
Total PSU DC Loading = 0W (0% of Rated Maximum Output Power)

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 244VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
3.16A
3.32V
3.3V±5%
+0.6%
+5V
4.84A
5.05V
5.0V±5%
+1.0%
+12V
15.71A
12.14V
12.0V±5%
+1.2%
-12V
0.36A
11.94V
12.0V±10%
-0.5%
+5VSB
10.22A
4.96V
5.0V±5%
-0.8%
Total PSU DC Loading = 240W (23% of Rated Maximum Output Power)

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 242VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
8.31A
3.29V
3.3V±5%
-0.3%
+5V
9.62A
5.01V
5.0V±5%
+0.2%
+12V
37.77A
12.07V
12.0V±5%
+0.6%
-12V
0.35A
11.98V
12.0V±10%
-0.2%
+5VSB
1.99A
4.88V
5.0V±5%
-2.4%
Total PSU DC Loading = 545W (52% of Rated Maximum Output Power)

 

Corsair HX1050 1050W (CMPSU-1050HX) DC Output Voltage Load Regulation
Supply = 233VAC/50Hz
PSU DC Rail
Rail Loading
Measured Voltage
Permitted Regulation
Actual Regulation
+3.3V
13.21A
3.25V
3.3V±5%
-1.5%
+5V
14.54A
4.95V
5.0V±5%
-1.0%
+12V
78.74A
12.00V
12.0V±5%
0%
-12V
0.36A
12.01V
12.0V±10%
+0.1%
+5VSB
2.02A
4.86V
5.0V±5%
-2.8%
Total PSU DC Loading = 1074W (102% of Rated Maximum Output Power)

 

The Corsair HX1050 produced an excellent set of results in this section. The regulation is about as good as it gets with the major rails, +3V3, +5V and +12V, holding well within ±2% of the required voltages. The +5VSB and -12V rail didn't perform as well (not unusual), but still remained well within the limits set down by the ATX12V V2.2 specification.

Testing (Continued):

Efficiency and Power Factor:

Efficiency is a measure of the ATX power supplies ability to minimize losses during the conversion of the AC mains voltage into multiple DC rails. It is a simple ratio of output power measured in watts over input power measured in watts expressed as a percentage. It has no affect whatsoever on the power supply’s ability to power a PC but with higher efficiency comes less heat and lower utility bills; it’s also “green” and friendlier to the environment which is the driving force behind the 80 Plus certification program.

Power factor is a strange beast that’s difficult to fully explain without the use of complex AC theory, so let’s keep it simple. Power factor doesn’t have a unit of measurement - it’s a simple number from 0 to 1 that is concerned with the way various loads consume power and the nearer to unity the better. It is closely linked to 80 Plus certification because low power factors imply wasted energy that the normal domestic consumer does not get charged for, but the utility companies still have to generate.

 

 

 

 

 

 

 

 

 

 

 

 

 

Supply at 110VAC:

 

 

 

Corsair HX1050 1050W (CMPSU-1050HX) Efficiency & Power Factor
Supply = 110VAC/50Hz
DC Load (W)
0
237
535
1080
DC Load As A Percent Of Max (%)
N/A
22.5
51
103
Efficiency (%)
N/A
86
86
83
Power Factor (PF)
0.78
0.98
0.99
0.99

 

The Corsair HX1050 produced a fairly typical set of results in this section that fell a little short of the 80 Plus Silver requirements (85%, 88% and 85% efficiency at 20%, 50% and 100% DC loading) following the OCC power supply testing methodology. The OCC power supply testing methodology doesn't exactly replicate the rail loadings and a shortfall of one or two percent isn't unusual so it would be unfair to mark the power supply (or any other that produced similar results) down in this section. Power factor levels are rarely if ever a problem in high end power supplies, especially with a 110VAC supply, and the HX1050 easily kept the level above the required 0.9 mark at 50% DC loading.

 

Supply at 230VAC:

 

 

Corsair HX1050 1050W (CMPSU-1050HX) Efficiency & Power Factor
Supply = 230VAC/50Hz
DC Load (W)
0
240
545
1074
DC Load As A Percent Of Maximum
N/A
23
52
102
Efficiency (%)
N/A
87
89
85
Power Factor (PF)
0.24
0.93
0.97
0.98

 

The performance of the HX1050 with a 230VAC mains supply is also typical of many other power supplies in this class with better efficiency and very slightly lower power factor levels. The efficiency levels meet the 80 Plus Silver requirements with 87%, 89% and 85% but as with most power supplies the certificate is valid for 117VAC and not 230VAC. Power factor levels are up there with other units tested by OCC and a maximum efficiency of 89% isn't too shoddy.

No problems in this section, so let's move on.

 

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 = 10mv/div, Timebase = 20mS/div

 

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

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 20mS/div

 

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

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 20mS/div

 

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

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 20mS/div

 

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

Oscilloscope settings: Amplitude = 10mv/div, Timebase = 20mS/div

 

Corsair HX1050 1050W (CMPSU-1050HX) AC Ripple/Noise
Supply = 233VAC/50Hz DC Loading = 1074W
DC Rail
+3V3
+5V0
+12V
-12V0
+5VSB
ATX12 Max (mV p-p)
50
50
120
120
50
Ripple (mV p-p)
32
37
64
83
27
Pass/Fail
Pass
Pass
Pass
Pass
Pass

 

The Corsair HX1050 produced a satisfactory set of results in this section with the noise/ripple levels remaining within the limits set down by the ATX12V V2.2 specification at all times. The levels are it must be said a little higher than some other power supplies tested by OCC in this class, but they are within specification and whilst not a problem, they could be lower.

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

Corsair HX1050 1050W (CMPSU-1050HX) 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
740/743
237/240
22.4/22.6
27.6/25.3
5.2/2.7
738/739
535/545
22.5/23.4
30.1/28.2
7.6/4.8
731/732
1080/1074
23.2/23.3
35.8/32.4
12.6/9.1
1347/1138

 

The Corsair HX1050 temperatures and fan speeds are typical of many power supplies in this class. Noise is of course subjective, but the fan speeds closely mirrored the noise/power supply loading graph shown on the packaging. The fan speed remained relatively low at approximately 740RPM (quoted at 20dB) until somewhere beyond 50% DC loading point at which time it ramped up to 1300RPM (quoted at 35dB) at full load. The Yate Loon fan is rated at 2800RPM and a rather loud 48.5dB so it's obviously not fully driven.

Conclusion:

 

Price Per the Watt:

Power Supply Cosair HX1050 1050W at $209.99 = $0.20/Watt (12-2011)

 

The Corsair HX1050 performed very well overall. The DC voltage regulation is excellent and in combination with what as to be said are only satisfactory noise/ripple levels still means decent DC quality. The efficiency fell a little short of the 80 Plus Silver requirements following the OCC power supply testing methodology but not by much and a maximum efficiency of 89% is still pretty good.

The Corsair HX1050 is a little longer than the standard ATX power supply and this will need to be taken into account when looking for a case. There are plenty of connectors but you can't use the second modular 4+4 pin ATX12V/EPS12V cable and all six 6+2 PCI-E connectors at the same time because there's only four blue modular sockets available.

The Corsair HX1050 power supply is well made, nicely packaged and comes with a good set of accessories and all for just over $200 at most major retailers. A fair price when you look at what else is available in its class. If you are in the market for a solid power supply at a reasonable price then the HX1050 comes highly recommended. I have no hesitation in awarding the Corsair HX1050 power supply a OCC Silver award.

 

Pros:

 

Cons: