Corsair HX1000W Power Supply Review

Performance Tests

Processor: Intel Core 2 Quad Q6600 @ 3.5Ghz (B3)
Processor #2: Intel Core 2 Duo E8400 @ 3.6Ghz
Memory: 4GB Corsair Dominator DDR3 @ 1600Mhz (Thanks to Corsair)
Motherboard: Asus Blitz Extreme
Motherboard#2: DFI LANParty X38 Dark
Graphics Cards: 2X Gigabyte HD2900XT 512MB
Graphics Card #3: ASUS 9800GX2 TOP
Disk Drive: Pioneer DVD Writer
Hard Drive: Seagate Barracuda 320GB SATAII
Hard Drive #2 Hitachi Deskstar 500GB SATAII
Fans: 5X Yate Loon 120mm @ 1200RPM
Monitor: Samsung 305T

PLEASE NOTE THAT OUR 1KW TEST PLATFORM HAS BEEN UPDATED

For our complete power supply testing methodology, please go here: Hardware Canucks Power Supply Testing Methodology


Efficiency Testing


Overall, the efficiency if the Corsair HX1000W is extremely good; even better than the Antec Truepower Quattro 1000W which is another 80Plus rated unit. Since the Toughpower 1200W and Corsair’s units are both based off of the same platform, it isn’t surprising that their numbers are very similar across all of the efficiency tests. Is the 80Plus rating warranted? Yes, definitely.


Voltage Regulation Testing

+3.3V Regulation



+5V Regulation



+12V Regulation


As the famous Star Wars line goes: “Impressive. Most Impressive.” The voltage regulation shown by the HX1000W is some of the best we have seen with a maximum of voltage delta of 0.05V on the +12V rail which is just stunning. What impressed us the most was that in the Extreme load test where Corsair’s high wattage unit is powering more components than literally any consumer has, its voltage barely budged.

Since both the idle and the CPU load test +12V readings are taken directly from the non-modular CPU connector, it was interesting to see that this is where the HX1000W displayed its largest voltage drop. Whether this is due to resistance or something else can be debated forever, the voltages still stayed well within tolerances.