bump
I have the card set up now with a decent overclock. The subjective speed improvement over my old 7800 GTs in games where the vsync previously wasn't working is pretty remarkable, even when both the online benchmarks and the actual framerate readings favor the GTs. There is definitely something funny going on with SLI in these games, well beyond the normal tearing effects. I'll post more on that in a few days once I have made some more observations.
Anyway, I am having a problem where a number of games are rendered too dark. Deus Ex looks particularly bad, but it's a problem in many other games too. It seems that the brightness adjustment in ATI Tray Tools (in the color settings menu) is only being applied to the windows desktop and not to any games, which I think might be the cause of this problem. Is there a way to apply the brightness adjustments to everything? Some old games don't have any brightness settings of their own, so I can't set it in there.
If I can get these brightness issues worked out, this card is looking like a real winner for my purposes. It's great to have D3D triple buffering, some decent AF and no more alt-tab crashes in Freespace 2, and the HDRish shader thing also seems to have potential once I figure out how to tone down the effect.
The stock cooler is loud, but it's actually not as bad as I thought. I use the default 27% speed in windows and 75% in games, and both sound fairly acceptable to me (although I use headphones in games anyway). It only really sounds annoying when the fan speed suddenly changes, so I keep it fixed at that speed in games.
Also, does adaptive AA work in OpenGL games? I can't find that option in Tray Tools for OGL game profiles.