My old setup had two MCR320's outside the case, and even with 55*F room temperature (winter time with the window open) the temps would reach 60C under load. Now, with my CPU lapped and two MCR220's inside the case it gets mighty toasty. I have my fans running at silent speeds which is nice, considering I can't hear my machine from downstairs anymore, but its getting way too hot. Outside temps are 71*F in Mid-February in Virginia today and I decided to go out for a few hours with the machine running. I walked into my room and it had to be bordering on 90*F. My case was 36*C and my CPU was IDLING at 60*C. Ouch.

I pumped the radiator fans up to max speed for a few minutes with the window open and a fan blowing in 71*F air from outside, and now its idling at 40C. Case is still 28*C though.