Picked up a ASUS DK TOP 4870 and the temps are a little high. Tried OCing a little and it crashed. I have an old Arctic cooling S1 laying around so I picked up a couple of 2000RPM 100mm fans and put on it and installed it on the 4870. This dropped my stock idle temps from 55C to 43C. Not bad I thought but when I ran Furmark to see how hot it got my temps went above 100C in a minute then crashed. I've tried reseating it. Different thermal compounds. Same thing every time. Anyone have any ideas? Is the S1 non Rev2 incompatible with 4870? It appears to be making good contact. Mounting holes line up. Guess I'll put stock cooler back on.