Metal-Maniac :
Thanks for all the insight guys. Now to get a little bit off-topic: I've been looking for PSUs and got confused as to what to pick... What are all these?? ATX 12V V2.31 ATX 12V V2.31 EPS 12V V2.92 ATX12V EPS12V ATX12V V2.2 ATX12V V2.2 SSI EPS 12V V2.91 ATX12V V2.3 ATX12V V2.3 EPS 12V V2.92 ATX12V V2.3 SSI EPS 12V V2.91 EPS12V
ATX power supply revisions
ATX12V v2.2
Another minor revision. Added 8-pin connector for PCIe graphics cards, that delivers another 150 watts.
ATX12V v2.3
The most recent revision, effective March 2007. Efficiency recommendations were increased to 80% (with at least 70% efficiency required), and the 12 V minimum load requirement was lowered. Higher efficiency generally results in less power consumption (and less waste heat), and the 80% recommendation brings supplies in line with new Energy Star 4.0 mandates. The reduced load requirement allows compatibility with processors that draw very little power during startup. The absolute over current limit (240VA per rail) is no longer present, enabling 12V line to provide more than 20A per rail.
EPS12V
EPS12V (Entry-Level Power Supply Specification) is defined in SSI (Server System Infrastructure), and used primarily by SMP/multi-core systems such as Core 2, Core i7, Opteron and Xeon. It has a 24-pin main connector (same as ATX12V v2.x), an 8-pin secondary connector, and an optional 4-pin tertiary connector. Rather than include the extra cable, many power supply makers implement the 8-pin connector as two combinable 4-pin connectors to ensure backwards compatibility with ATX12V motherboards.