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Silver Spec but Gold Strength, Power Saving PSU-CORSAIR HX750W Review

2:17 am, April 23, 2017

Original Post Date: 5:58 am, July 16, 2014

CORSAIR is long history memory brand. His DRAM product has very good reputation in the market.
Even though CORSAIR just enters power supply market for few years, its products are good quality and stability.
COASAIR divides his power supply into 3 series.
HX series is the highest. It’s in modulized design. High quality also means high performance.
TX series has non modulized design, bigger watt and fair price.
VX series watt is smaller than TX. It’s suitable for users who have budget concern.

Last year you could see many CORSAIR power supply discussion and most strings are HX750W.
Recently, CORSAIR announced HX850W, but this review is still HX750W.
750W in watt combination and market price will be more acceptable for users.

Let’s look at the package first. It’s a bigger paper box.
Currently, most power supply provides 3~5 years warranty. HX750W has 7 year warranty.
It shows COSAIR’s confidence with their quality system.
HX750w also passed 80 Plus Silver certificate. Now the most common spec is Bronze certificate.

High quality cables pack, multi lingual manual, cable ties, screws and power cables.

Modulized cables
4 X PCI-E 6+2 Pin
8 X 4 Pin
2 X Floppy

Power supply packed by flannelette bag

CMPSU-750HX body

Cables extended from power supply
1 X ATX 24/20 Pin
1 X EPS/ATX12V 8/4 Pin

Back side deign is common cellular holes.
Active PFC in 110~240V

Modulized cable connectors
If they have some instruction stickers, that will be easier for users to understand clearly.

12 X 12 cm silent fan. The rotation rate is controlled by watt utilization.
Noise level, below 525W is 25dBA and 525~750W is 26~34dBA


The test configuration is GIGABYTE P55A-UD6, the very high end spec in LGA 1156 products.
In the beginning, I planned to use LGA 1336 with Gulftown CPU to do the power consumption test.
However, base on my recent experience, when OC LGA 1156 to full speed, the 12V consumption is extremely high.

UD6 has USB 3.0 and SATA3, latest MB spec.

CPU: Intel Core i7-870
HD: Seagate Barracuda XT 2TB
Cooler: Tuniq Tower 120 Extreme
OS: Windows7 Ultimate 64bit

OS system set up
CPU 200 X 20 => 4000.6Mhz
DARM DDR3 2000 CL8 8-8-24 1T

OCCT V3.1.0
POWER SUPPLY mode, Shader Complexity 8

Above spec is the configuration for this review. It shows the power consumption status during test.
I use Power Angle measure number to the reference.

Enter to OS desktop - 230~231W

Running power supply test item in OCCT
i7-870 OC 4GHz, quad physical cores and quad HT virtual cores run in full speed plus GTX260 SLI 2WAY and GTX260 PhysX - 707~730W

Power Angle measure data is only for reference.
It only measures the approximate power consumption value. It’s not very accurate.
Even I didn’t use 3WAY SLI to reach the max 3D performance by full system load.
However, install one more GTX260 for PhysX also can increase some power consumption. It’s also some help for high loading test.

OCCT test result
CPU voltage variation
Standby is around 1.36V and full speed is always stay at 1.38V
CPU voltage vibration range is related to MB voltage quality.