Summary: Don't get me wrong this card is really awesome specially for the price, I have not OC'ed mine (beyond the Saphire OC) as there is no need to for pretty much any game at 1920 x 1080 resolution, but this card has a great OC potential if you are into that.
Summary: Replaced my old 5830 with this, very impressed. Keeps cool with temps ~55-60C and the fans are nearly silent. Unbelievable OC headroom makes it a great value (stable at 1150 Core/1225mV/5100 Mem). Runs Skyrim 1920x1080 Ultra settings and HD packs with no problems at all, still not even working hard.
Summary: Issue #1, as soon as I installed the driver from the CD that came with it, I noticed my onboard sound was gone. It turns out that because this has HDMI, it's got its own soundcard and without asking, it makes itself the default device.
Summary: I did some extensive research regarding bang for your buck in my choices of components for a major hardware upgrade to my old desktop machine and the Sapphire HD 7850 OC edition seemed to warrant a closer look.
Summary: I am satisfied with this product so far. The performance is great, BF3 on ultra runs great and I have not had any problems with other games as of yet. Easy to install and very quiet, this card is definitely worth the cost.
Summary: So far im extremely satisfied with this card upgraded from a 5770HD. its very quiet, 2gb vram, idles around 28C, its OC, and two fans! BF3 i get +45 fps with most ultra and high settings same goes for the witcher 2 and 60 fps for skyrim.