I installed the OCZ ModXStream 600 into my primary system, comprised of the following hardware:
AMD Phenom X4 9850 @ 3.0Ghz
Biostar TF8200 A2+
2x1Gb OCZ Titanium PC6400
EVGA GTX 260 @ 738/1250
Using the Kill-A-Watt meter I measured the power usage of this system to be 120W at idle and 350W under load. The two biggest power consumers in a computer are the processor and video card, so I used the Folding@Home SMP client and the GPU client to generate load conditions. Voltage readings were taken using a Fluke Multimeter directly from the main ATX and PCIe cables.
As you can see, the OCZ ModXStream 600 handled the load quite well. Voltage readings from the +3.3 and +5.0 rails varied by only 0.02-0.03 volts. Only on the +12.0 did the voltage dip significantly, and that only by 0.16 volts. There was little variation in the readings; I observed only a 0.01 volt fluctuation at most.
Let's wrap up this review with some final thoughts.