I built my mates pc with a type-r 580 a year ago (7800GTA64 3200+ 2gb kingston ultra3200) and his runs very nice.
Another mate has has a seasonic S12 600watt (620?) in a lian li case and DAMN it lets out a crapload of heat INSIDE the case which in turn heats up the other components - I used to have a type-m hiper which did exactly the same (they both only have 1x 120mm fan) - they would let too much heat back into the case via the inside rear vents.
mrk said:
heh mine doesnt let off hardly any extra heat

but mines only 2 weeks old..