For the Crossfire review I am using a pair of HD4870s, a pair of HD4850s, a combo of HD4870 + HD4850, a combo of HD4870 + HD3870 and finally a HD4850 + HD3870. The 8.7 drivers plus the HD4870 cards worked without a problem at all but the HD4850s is proving to be a major PITA for no apparent reason. You would think that the cards would behave literally the same as the 70s but that would be too easy, now wouldn't it.
Here is a quick list of the issues:
- 3DMark06: monitor goes blank at the beginning of the Canyon Flight ONLY at 1600x1200 + 4XAA....EVERY TIME
- 3DMark Vantage: Display Driver error during the second to last feature test
- Crysis DX10: Display Driver error at 1600x1200 resolution in 64-bit mode
That is as far as I got before I gave up and started benching a different card. I am going to try again today on ANOTHER clean install of Vista x64 but from where I am standing right now, the 8.7 drivers are an absolute mess.