Ok, I've got a computer I built about 6 months back. It's a P4 3.0GHz with a couple of SATA HD's and a mediocre video card in an Antec Sonata case. I recently installed the United Devices cancer research software (see the thread in the After Hours lounge) and was excited to be able to help such a great cause. Well, I'm now a little concerned. When that program gets going and using 70%+ of my CPU, the temperature of my CPU goes up to about 140 F. Is this safe to have it run at this temp for extended periods of time? The motherboard cuts the CPU at 167F, but it still just seems a little high. The Sonata has a spot in the front of the case to add a 120mm fan to pull air into the case. How much of a difference would this make? Also, would RAM heatsinks help much? Replacing the CPU cooler isn't really an option right now, simply because I don't want to do it and risk screwing something up.