Enermax Whisper II 2.0 535W SLI
As the Enermax Whisper II 535W (EG565P-VE FMA) PSU isn't modular nor requires any special mounting procedures, the installation was carried out in our usual fashion. NVIDIA states their minimum recommended PCI Express power supply for a GeForce 7800GTX or 6800 Ultra should supply 500-550W and +12V @ 30A of power, with the Enermax Whisper II providing 535W and 18A on both the +12V1 and +12V2 rails (36A) in addition the PSU we have in front of us is SLI certified by NVIDIA, so there should be no power constraints running the unit with the latest generation SLI cards from NVIDIA. Unfortunately, NVIDIA has yet to officially support its SLI Technology under Linux, so for our testing we reverted to using a single 7800GTX and for additional power consumption an Intel Pentium D processor. Our complete setup consisted of the contents listed below.
After installing the Enermax PSU, the system proceeded to boot up fine without faults. After allowing the PSU to run continuously for a week, we proceeded to do our general stressing and measurements. We first allowed the unit in the above-stated system to idle with no other active processes running outside of the general Linux ones for 30 minutes, and then we had stressed the system with CPUBurn-In v1.00 for the same amount of time. To measure the various voltages, we had used a calibrated WinMax Global digital multimeter.
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