Testing:

To test the idle and load voltages of the Cooler Master Real Power Pro 750W Power Supply, I installed it in a system with the following components:

» AMD Opteron 148 processor
» DFI LAN Party NF4 SLI-DR motherboard
» 1024MB G.SKILL Extreme DDR (2 x 512MB) memory
» 3x Hitachi Deskstar 80GB 7200RPM SATA-II hard drives
» 3x Western Digital 36GB 10K RPM SATA-I hard drives
» Two eVGA GeForce 7800 GT CO SLI 256MB GDDR3 PCI-E video cards
» Pioneer DL DVDRW
» SB Audigy 2z Platinum sound card
» 2x Enermax Enlobal 120mm fans

For voltage readings I used a Fluke 83 multimeter. The idle condition was established by powering the system at stock speeds and voltages with no applications running for a period of at least 30 minutes. The load condition was established by running Prime95 and 3DMark06 for a period of at least 60 minutes. In addition to these stressful applications running, the system was overclocked and overvolted to add more demand to the power supply.


As you can see from the chart above, the voltage rails held up very well even while the system was hard at work.


As a point of reference, the load voltage readings from the Cooler Master Real Power Pro 750W Power Supply were compared with the readings from a Zippy (EMACS) GSM-6600P 600W and an OCZ Technology Powerstream 520W power supply.