Case fans
I agree, but one little thing: don't forget the fan/heatsink on your CPU
LOL What I could recommend is a thermometer to measure the temps of the air entering and leavind your case, give's you a nice idea whether your case fans are sufficient. I use the PSU fan, 80mm out at the backside, PCI slot radial cooler out, HD-cooler in (2x 30mm fan and big hole, dust filter, to compensate for all the outgoing air). Not to forget the closed circel waterloop with bleedtube and radiator outside the case in separate, ready to go housing (for lan-parties etc.). Watercooling made most of the case cooling absolete, but too much cooling can't hurt, for if cooling fails e.d.?
some days ago, my fan which pumps the air through my radiator to blow the heat out of the coolant stopped functioning at night, with the computer running SETI and me sleeping (according to temp registration, it must have stopped half an hour after I went sleeping). Next morning, it was silent... TOO silent. The fan is the only thing I hear. I went to have a look, fan stopped. **** feld the tubing, warm-hot. Because of the water still going round, and the temp high, it dumped enough heat to surroundings passively. good for me. My core went to 45°C, coolant must have been around 35-40°C, most of the latter. Block and tubbing in my case are passively cooled by case fans. The rest outside the system also helped.
When your pump stops, it's end of story. That's something you can't correct by passive cooling. Worst case scenario is that of melting tubes on your block. That's the reason why I use a brand new pump.
Oh, ****, you were just a newbie with a question 'bout case cooling. Yeah, it's good, take the advice from OpenFriday. Hope you enjoy the dangers and adventures of OC'ing.