A lot of people on other forums are having trouble with the Duoorb cooling the 4870 even at stock speeds. Under load they're getting temps well up to and beyond 90 degrees which is worse than stock.

I'd get some water on that thing, these suckers get hot, even more so after extra volts and overclocking. I'm sure a TRUE would do the job aswell


@LuxZg i never tried it on the 4870. I doubt it would be better than the stock fan due to the way the heatsink is designed. If you look closely, the fins are 'closed' at the top so the air needs to be forced from the side to be effective.