Quote Originally Posted by SparkyJJO View Post
I have been under the impression that with stock cooling things are fine. Bit hot because they set the fan really low, but it is ok. Just when you get into aftermarket cooling you may have problems, but that of course is not ATI's fault.
No, even stock cooling has issues. That's the problem. You should try it on the stock cooled 4870. Unless your ambients are low and your fan speed is very high (like 90%+) running FurMark for a bit will most likely crash your card even at stock speeds. Even if you do not crash by some chance, running your VRMs to 125C+ is outside their operating range so you can expect failure any time. So far I have tested a bunch of 4870s trying to get to the bottom of this problem all with the same results. Changing VRM cooling though to something nuts like the mobo HR-09S Type 2 MOSFET sink stops the crashes and lowers the VRMs to a nice 80-ish celsius.