SilverStone Zeus ST75ZF 750W
The needs for a quad +12V 750W PSU really at this time are separated into two groups -- those who need the power now and budget users who are always in a continual upgrade cycle with purchasing the components when they need them, and they end up using the same components for years to come. With the SilverStone Zeus ST75ZF specifications, this unit should have no problems powering most any high-end desktop or workstation system currently available -- up to and including dual processors and four graphics cards. Due to ATI CrossFire failing to exist under Linux, and NVIDIA's Scalable Link Interface still being quite rudimentary in our professional opinion, for our testing we had used an i955X powered motherboard, three Serial ATA drives, an overclocked Intel Pentium D dual-core, and ATI Radeon X1800XL. In addition, we used a 120W thermo-electric cooler -- a retail device that will be reaching the market shortly. Upon the product reaching the open market, we at Phoronix will be showing pictures and providing information accordingly.
Before moving onto the voltage results, we must say the Zeus ST75ZF was admirably quiet for being a high-end 750W power supply. Monitoring the power supply, there was adequate airflow and no signs of thermal problems. Using our traditional PSU testing techniques, idle voltages were obtained by having the system idle within GNOME v2.14.1 for 30 minutes with all power management features (i.e. screensaver or ATI PowerPlay) disabled. Load testing had occurred by running loops of the Doom 3 demo1 and CPU Burn-In v1.00 for the same period. All voltage rails were measured using a calibrated digital multimeter. With the SilverStone Zeus ST75ZF sporting four +12V rails, we monitored the +12V1 and +12V2 by tapping into the 8-pin EPS12V connector, +12V3 using the 4-pin molex connector, and +12V4 using the 6-pin PCI Express interface.
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