I recently picked two (Visiontek) of these up for some crossfire goodness. You can see my system specs below. I'm not a fan boy and both Nvidia and Ati can kiss my arse. I'll share a few observations. These cards run hot as hell. You will burn your fingers trying to touch these after running for a few minutes. Idles around 78* and loads well over 90*. I have 4 120MM fans blowing on the case side and I encountered numerous lockups at stock speeds. Default fan speeds suck and hopefully rivatuner will allow for adjustments. Crossfire doesn't scale all that well on my current motherboard. I had various lockups and performance wasn't that impressive. Other reviews seemed much better. I loaded updated 8.6 drivers and the Vista X64 hotfix, but nothing really mattered. Ati should drop the price on this thing closer to $130 for this to be a decent deal and use a better cooler. I'm sure others might have better luck with a dual x16 Pci Express board, but I still expected more out of this with my P35 chipset. I think I'm going to stepup to a GTX 260 and trade-in my G92 GTS. However, I would definitely recommend the G92 GTS over the Ati 4850 at current price levels and I would be cautious with crossfire on certain mainboards because YMMV.
Final conclusions: (1) seems slower than a G92 GTS for around the same price and (2) G92 GTS runs cooler and overclocks like a champ
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