Right now my motherboard temp is sitting at about 23c and my cpu is idling at 75c. However, if I enter a cpu intensive program (games etc) it has risen to around 88c. I don't think it has hit 90 yet. I really dont understand. However, I am using the stock heatsink with the one fan mounted above the cpu. I've never had to face cooling before as my previous cpu was a 1.8ghz celeron. I've been getting blue screen shutdowns non stop due to overheating so I went out and bought some thermal paste and applied it. I guess I lost a bit of temp as my pc actually booted into windows for a change (it would restart once everything in startup would finish). Not to mention I have the two sides of the case off and I have a big fan sitting on the outside blowing in on full power. And by the way, at the moment I have a 3.4ghz pentium d. I've heard they get hot, but this isn't good.