Watch your temps!
Added this XFX5850 to an existing Asus (reference) 5850 for crossfire. The XFX 5850 temps reached 100C @ 100% fan speed in about 45 seconds in furmark (Asus card hovered 65C), after inspecting the heat-sink, heat was not being transferred through both heat pipes, one pipe was smoking hot, while the other was nice and cool and clearly not transferring any amount of heat off the block. No visible signs of damage to the heat-pipe or block; It just wouldn't transfer heat on one side..? I pulled the XFX and am currently eagerly awaiting an aftermarket GPU heat-sink. I could have easily had a 560TI or 6970 (and similar to crossfired 5850 performance) for the amount I have sunk into this card. Overall XFX 5850 performs as it should, crossfire setup was oddly pain free, added the second card, linked them, connected the two 6pin power cables, booted windows, screen flashed a bit for a second, then it was ready! (minus the broken heat sink of course...) I would imagine when functioning correctly the heat sink would provide sufficient cooling, but ensure your heat sink is functioning correctly before you smoke your card. 21500~ 3DMark Vantage in Crossfire @ default clock 5/5 rating IF that heat-pipe wasn't broken and it was $120 cheaper
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