this thing is awesome. i put this on my pc and it really dropped the temp down. a 3*120mm radiator cools up to 1000watts of heat, and my cpu generates 150 watts(intel core2 quad q8300 OC). so, im gonna get a waterblock for my hd6870 (when i buy it) and it'll be even better. Remember: DO NOT USE TAP WATER, USE LCS LIQUID OR DISTILLED WATER WITH ANTI-CORROSIVE ADDITIVE.