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Corsair HX750W Power Supply Review

paulktreg    -   August 2, 2009
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Closer Look:

The Corsair HX750W is finished in the usual slightly textured matte black paint finish with the labels following the packaging's blue/black theme. The power supply, much like most modular units, has the 24-pin and 8-pin connectors terminate at the PCB inside the housing and are sleeved to protect the wiring, as well as provide better aesthetics.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply back panel with hexagonal honeycombed grill, IEC mains input and mains on/off switch. The front panel of the power supply showing the modular cable sockets, blue for the four PCI-E cables and black for the peripheral, SATA and FDD supplies.

 

 

Blue and black Corsair HX750W label on either side.

 

 

Large 140mm black cooling fan with black grill bearing the Corsair logo at its center and the specification label on the underside.

 

 

Below, you'll find a photograph showing the captive motherboard 20/24-pin connector and EPS/ATX12V 4+4-pin connector. Both cables are fully braided all the way into the enclosure, which is nice to see. The modular cable set is made using low profile flat cables that, according to the supplied literature, "allows for superior airflow." However, unless a little cable management is utilized, they could also impede airflow more than the usual round cable profile. I don't like the use of all black cables, but this is probably due to the fact that I am constantly measuring voltages here and there and a little colour helps me recognize the rails. This won't prove to be a problem for most users, so I can't really fault Corsair. Instead of the usual wired hard disk drive power connectors, Corsair have opted to supply two peripheral to FDD adapter cables. Not a bad idea since the floppy disk drive is becoming an optional extra these days.

 

 

 The Corsair HX750W uses the 140mm GP D14BH-12(L-SSS) fan, rated at 12VDC 0.7A and manufactured by Yate Loon.

 

I expected to see the same board as used in the TX750W, but Corsair has used a completely different design. I couldn't find any indication of a manufacturer, but the board utilizes DC-to-DC converters for the 3V3 and 5V rails and a bit of extra capacitance on the primary, with two 330uF 420V electrolytics in parallel. The two DC-to-DC converter boards are the two upright boards in the bottom of the photograph above the yellow cable loom. Corsair's claimed feature of 105°C solid state capacitors is perhaps a little misleading. They are all rated at 105°C as stated, but the majority are standard Nippon Chemi-Con electrolytics and solid state capacitors are only used on the two small DC-to-DC converter boards.

 

The two main switching transformers can be seen towards the center of the board. The larger of the two, with the green top, takes care of the +12V rail and the adjacent smaller transformer is used for the +5VSB supply.

 

 

The overall build quality is excellent. I can't fault it so far, so let's move on.

 




  1. Introduction & Closer Look
  2. Closer Look (The Power Supply)
  3. Specifications & Features
  4. Testing: DC Voltage Load Regulation At 110VAC & 230VAC
  5. Testing: Efficiency, Power Factor & DC Quality
  6. Testing: Temperature, Noise Level & Fan Speed
  7. Conclusion
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