Radeon HD4850 + Zalman VF-950 (my own custom mod) Just one hint for all the HD4800 users. If you want to boost up your card without trashing half of your piggybank into it, then read on. All you need is some courage to take heatsink off your brand new card and some high grade thermal grease. For todays "show" i've used Akasa ProGrade+ 5022 thermal grease. It's not all that expensive silicon paste with incredible performance. Results? Idle didn't changed much, maybe around 1-2°C at most. However the other end changed greatly. Full load using RTHDRIBL resulted in a rock steady 88°C using 660MHz core). Stock paste at same clock reached around 92°C. Need more. I've clocked the core to whooping 700MHz, the max Catalyst allows at this point. Crysis and CS:S started artefacting pretty fast even at 670MHz and locked up to desktop at 690MHz. Now, it's perfectly stable and no artefacting at 700MHz. Results: Idle = 80°C Full load @ 660MHz core (stock grease) = 92°C Full load @ 700MHz core (Akasa ProGrade+ 5022) = 88°C So do your card a favor and give it some high grade thermal treatment. They deserve it!