| OCZ Technology GameXStream 700W Power Supply Unit
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Testing:
To test the idle and load voltages of the OCZ GameXStream 700W, I installed the following equipment:
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Idle
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Load
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AMD Opteron 148 processor @2200MHZ (stock voltage)
DFI Lanparty UT NF4 SLI-DR Expert (default settings)
1GB (2x512) Corsair TwinX1024-4000PRO DDR
2x 80GB Seagate SATA 3Gbps hard drive in RAID 0
1x 120GB Hitachi SATA hard drive
Memorex DVD/CDRW
10-n-1 Media Card reader
eVGA 7900GT KO PCIe card
Fans: 2x120mm
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AMD Opteron 148 processor @2750MHZ (250x11)
DFI Lanparty UT NF4 SLI-DR Expert (default settings)
1GB (2x512) Corsair TwinX1024-4000PRO DDR
2x 80GB Hitachi Deskstar SATA-II hard drive Raid 0
2x 120GB Seagate 7200.9 SATA 3Gbps hard drive Raid 0
1x 40GB Seagate 7200.8 SATA hard drives
eVGA 7900GT KO PCIe card
eVGA 7800GT PCIe
Fans: 4x120mm, 6x80mm
Cooler Master CoolDrive IV
1x Hauppauge 350 PCI TV tuner
2x USB thumb drives
USB 2.0 Hub
1x USB 2.5 hard drive
Sony DRU-500A DVD-RW
NEC DVD-RW
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The idle condition was established by powering the base system at default speeds and voltages with no applications running for a period of at least 30 minutes. The load condition was established by loading the system up with components and fans, while Folding@Home and SiSoft Sandra 2005's Burn-in Wizard ran for a period of at least 60 minutes. In addition to these stressful applications running, the loaded system was overclocked to add more demand to the power supply. The table below details the idle and load conditions:
You can see both the idle and load voltages above, and that there was a slight drop in voltages between readings. However, once the voltages dipped they did not fluctuate from these readings in the five (5) samplings I took. The largest drop in voltages was on the 12V and 5V rails, and each drop was only 0.01; hardly worth mentioning. These rails are the most stable rails I have ever used.
The next chart compares the load voltage readings of four power supplies. All of the values are well within an acceptable range of +/- 5% of specification, and absolutely zero power issues were experienced during testing.
With all the spare components I have laying around, I was unable to fully stress the 700W power supply. Using various web power supply estimators, I was only able to get about 680W of components, not taking into account the overvolting and overclocking of the CPU.
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