Performance

Nice specs. Four independent 12V rails are there to make sure your power output is stable at all times.


Tested on: AMD Athlon64 3000+ @ 2000 MHz, ABIT AT8, Radeon X1900 XTX + Radeon X1900 XTX Crossfire, 2x 1024 MB DDR400, WD Raptor 36 GB.

The 12V line is exceptionally stable. Actually I haven't seen such a stable line for a long time. The 5V line is very good as well, but this is not so hard to achieve because the power draw is a lot smaller. The 3.3V line fluctuates quite a bit, but again, most power is drawn from the 12V line.



Above image shows the Ripple Voltage measurement (5 mV per vertical division, 5uS per horizontal division). With 9 mV from top to bottom, the result is very good and adds to the impression the previous voltage stability test gave. Ripple voltage was measured on the 12V line at idle.


Standard deviation is a statistical term, which tells how far away from the average the measurements are. In other words it's the average of the average.
A large standard deviation indicates that the data points are far from the average and a small standard deviation indicates that they are close within the average.


With an efficiency of 72% the OCZ EvoStream 600W is only about average.

10% of efficiency come down to a yearly difference of $4.08 in power cost. This is assuming $ 0.10 per kWh, which is an accepted average value for power cost in the United States. We assumed 8 hours of PC usage per day, 5 days a week at 200W system average power draw.