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Testing: To test the EliteXStream, we are going to use the following setup:
Voltages: First off, we are going to measure voltage stability. Previously, I would use SpeedFan's built in logging capability to capture the voltage readings in realtime, while applying various loads to the system. This time, however, I am using OCCT's tool since it provides better resolution. OCCT also provides its own loading tool for the CPU. For the GPU, I used the 3DMark06 test "Deep Freeze", with 8xAA, 16xAF, at 1920x1200. I randomly applied loads over the course of 120 minutes to see if I could get any significant variance.
Here is the 12V rail over the course of two hours. We can see exactly when the 3DMark06 runs occurred, as we see a 0.05V drop on the rail as soon as the benchmark goes into 3D. Ideally, we would want to see a completely flat line, in reality you will see some variance under different loads. .05V translates into a 0.4% variance.  The 5V rail clocks in with absolute stability across the entire run.
The 3.3V rail also shows some minor sagging at the same time the 12V rails do. In this case, we are talking about a variance of 0.01V, so not a lot to worry about. At the beginning and end of the run, where the system is idle, the rail rests a little higher than under load.
While software monitoring tools are good for tracking variances, they are not so good at accurately measuring the rails. So, we use a DMM to measure the rails while idle, and we find everything is within spec. Efficiency:
Next up, we compare the EliteXStream to my current standby, the Corsair HX620 and see which one is more efficient. Power usage was measured at the plug with a Kill-A-Watt meter. Idle is defined as being on the desktop, and load was achieved by running Prime95 V25.4 and 3DMark06 at max settings simultaneously. Here we can see that the OCZ beats the Corsair by an hair in both Idle and Load measurements. Conclusion: There has been a lot of speculation as to how OCZ power supplies might be changed once PC Power & Cooling was brought into the wings, and it appears that an OCZ unit is still of a different breed than PCP&C. So far, we haven't seen OCZ turn their nose up at large fans like PCP&C does, though it is a shame that more OCZ units aren't modular. The performance of the EliteXStream is quite good, the 12V rail moves a little bit but is well within spec. Power efficiency is very good, even beating out the highly regarded Corsair HX620. Noise is nonexistant, even at full load. Pros:
Cons:
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