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PC Power & Cooling Silencer 750 EPS12V   Excerpted from:Heavy Gear February 2007 • Vol.7 Issue 2 Page 31 in print issue One 12V rail, quiet operation, and power enough for a cutting-edge system. I found that with the Silencer 750 EPS12V, PC Power & Cooling is being too modest. This non modular power supply's forte is quietness (26 to 40dBA from its auto-controlled fans), but it's also right at home in brawny systems that necessarily generate some fan or pump noise. This model of Silencer 750 has two 6-pin PCI Express plugs; there's also a Quad version with four. My first Windows XP SP2 test system had a quad-core Intel QX6700 Core 2 Extreme, a GeForce 8800 GTX using nVidia ForceWare 96.97 drivers, an Intel D975XBX2 mainboard, 2GB 1,066MHz DDR2, and three Raptors. I ran Prime95 on all four cores of the CPU in addition to 3DMark06 with 4XAA/16XAF at 2,560 x 1,600 resolution. This setup drew 378W under load. My Extech 380803 power analyzer showed a power factor of 99% of more, which is right in line with PC Power & Cooling's specs. No problems, no hiccups. With only two PCI-E connectors and an SLI certification topping out at twin 8800 GTSs or 7950 GX2s, I wondered whether this PSU would be up to powering dual 8800 GTXs. These monster cards take two PCI-E power plugs each, so I resorted to adapters to supply the extra two connectors. To enable SLI with 8800 GTXs, I switched to an cVGA nForce 680i motherboard per nVidia's instructions. The Silencer 750 EPS12V was rock-steady with 8800GTXs in SLI running my torture tests at peak case temp of 53 degrees Celsius. This system pulled 535W under load. After a few hours, the lower back corner of the case was hot to the touch, but the PSU kept on chugging. Credit PC Power & Cooling for quality components and a no-compromise build. by Marty Sems
Silencer 750 EPS12V $199 PC Power & Cooling www.pcpowercooling.com 
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