I found it interesting how easy this power supply could be modified to be made even cooler. The 3.3, 5, 12 and ground rails are all present on a OCZ labeled piece of circuitry which is easily accessed for whatever you want to do. One idea I had was to try Dremeling out the front and adding another 4 or 5 Molex sockets. A 120mm ball bearing blue LED fan is plugged into a small PCB which apparently has 2 unfilled sockets ripe to be used for all kinds of case lighting and cooling. I suspect the voltage going to the fan is not quite 12- as it is whisper quiet. There is only the one fan in this power supply as the fan intake and rear exhaust for venting, I suspect that it would be more than sufficient for cooling and far superior to a single 80mm fan.

Power output and Technical details: 520W: +3.3V(28A), +5V(52A), +12V(28A)

There is 260W on the two lower voltage rails and 336W on the 12 volt- at maximum output. That's 596 watts on the positive side absolute max output. The other 28w is made up by the -12v, -5v, and +5SB rails, none of which should really concern you, except that it does indicate at least that OCZ aren't trying to hide anything with their label. In essence, due to the loss of most 5v computer accessories and the real step up in 12v usage (i.e DVD burners, twin high powered video cards, and all the assorted accessories we modders love to use) the 12 volt rail is what you need to pay attention to when using this product. On average you can expect ~90% of max output to be the real power of the supply, and that provides 300W on the 12v rail- which is about 25A. The ModStream does not really shine as a super high output power supply. 25-28A on the 12v is sufficient for just about everything shy of a real high end setup with twin PCI express cards. In such a case, you might want to look at the PowerStream, or another PSU without necessarily higher wattage rating just higher amperage for 12volts, around 28 or 30A true output.

As far as the PFC is concerned on this model, all that OCZ states on their webpage is that the power supply possesses APFC in International models. Curious as to what exactly APFC was, and why this only applied to Europeans I did a little digging. For all definitions of PFC you can look here for a pretty comprehensive explanation. Europeans need APFC because otherwise the odds are good the electrical company will hit their bill. Contrary to popular belief, Power factor correction has absolutely nothing to do with the power your computer receives, and lots to do with how your electrical company bills you. If you have any questions, feel free to call your electrical company. Fear not North Americans, because I did manage to find out that we still receive passive PFC in all the ModStream supplies, just in case you do get billed. I wasn't able to find out in time for this review to be posted just how good the PFC rating is on the ModStream, but when I do I'll let you know.