Hi
@inapis.crazy,
My reply comes a bit late, sorry for that. I have exactly the same power supply as you (same year, same power, same name...). I would still plug this additional 4-pin CPU connector to the motherboard, if I were you, since it appears to be highly recommended in the manual (even though you don't do any OC). But the good news is that there is absolutely no problem with it!... because your awesome power supply is modular!
All you need is another Corsair
8-pin CPU connector (they don't provide any
4-pin version as far as I know). This one fits anyway because it's simply a
doubled 4-pin connector: you just need to plug one half of it to your motherboard. Of course, on your power supply side, this additional connector would take the place of a PCI Express connector (which uses the same input), but there is still of course one PCI Express input available along with these two 8-pin CPU connectors. Knowing that one PCI Express connector (on power supply side) can actually offer
two different supplies (on motherboard side), then don't worry... unless you want to build a three graphic cards configuration (as far as I know... graphic cards are the only type of PCI-E cards which needs this additional supply), your power supply is definitely safe with this build. Corsair sells this connector around 20 dollars, which is kinda expensive, but you can find some on ebay for around 5 dollars.
Maybe just a last thing, in case you don't know. Your 8-pin connector is probably a
Type-4 version like mine. The ones that are currently sold are of
Type-5. But precisely regarding the CPU 8-Pin connector, the version change has no influence:
backwards compatibility from T-5 to T-4 is ensured (Corsair mentioned it on its website)
Hope this helps...
P.S. Very special thanks
@CaseySJ for this great guide. I don't think that one can reasonably expect more than what you just offered us. This was convincing enough to take the plunge and upgrade my 5 years old hackintosh.