I'm using one of these to cool a Athlon 5200X2 over clocked to 3Ghz, and 4 gigs of OCZ FlexXLC DDR800 clocked at 925MHZ. My CPU temps stay at about 32C normal and 38C load, and have had this radiator for about 3 years now. If you're having issues with heat with this, then you need to look at the way you have your watercooling system setup. I have my radiator on my front case fan, so it gets the coolest air possible. I hope the first guy isn't trying to use his cases hot air to cool his radiator.