My Win98 box (I built it) had cooling and heating issue's at first as well, but once I added an extra fan and I took off added/not needed set's to the box, thing's were pretty good. Also, lepricaun had a point because of the summer time thing, I keep my A/C on in my room ALL DAY to keep things cool and it has done wonder's for my box. Considering the fact I like it cool while I'm online it work's greatly for the heating/cooling of a machine.