I'm using a desktop XP 2500+ @ 3200+, my CPU idles around 35C and wont go pass 40C under full load. Im using the SLK-947U with a Thermaltake Volcano 12 fan. I had originally the Volcano 12 as my cooler, but once i ordered the SLK, i just removed the fan that came with the volcano, and plopped it on the SLK. But seeing as how that will cost you more money than needed, i'd suggest you grab the Vantec Tornado. It's the best out there right now, the 80mm and the 92mm. Keep in mind though they do get loud, and the noise can be easly fixed with a noise dampening fan kit and/or a fan seed control regulator. I also just ordered a 2400+ Mobile and some AS5 to go along with it which shoud be here next week. I cant wait to see the temps on that puppy once it' OC'd. Also, before i used the SLK-947U my cpu idle'd at 45C, and maxxed out at 52C under heavy load.