Just bought a new PC magazine for this month. It's plenty of tests in it (as usual), and one - is very interesting. I've calculated FPS for Crysis (Very High) and I found very nice thing to note... if NVIDIA's SLI and ATI's CrossFire (2nd is more important) are raising performance (if 2 GPUs) on 100% - so 2 GPUs of Radeon HD 3850 on 256MB will do 24 FPS with "coins" (just what our eyes are able to see)! How you like... that?! Waiting on your comments... Apollo. P.S. ATI have made a very good step with those 256MB GPUs - low price and CrossFire compability with motherboards on Intel's P35 chipset (like my favorite P5K-E from ASUS). Edite: All that is for resolution of 1280x1024 (19-inch).
From what I've read, Crysis will pretty much murder any video card. If I use low detail, I can do 1024x768 on my GeForce 7900GS. It looks pretty good, but I've been used to doing 1280x960 if not 1600x1200, so it's a bit of a downgrade in resolution.
I can run Crysis on Very High, at 1680x1050 resolution (without AA) with a high FPS on an 8800 GTX. However the last levels where there is snow and aliens flying around, I need to lower the graphics quality in order to get a decent performance.
The increase of adding a second card in either SLI or Crossfire is not 100%. For some games it is as low as 60%. And that's with the correct chipset. Alot of people like to buy a p35 chipset and think that they can crossfire on it and get a good performance gain, instead of realising that the second pci-ex is only going to be 4x bandwidth. I hope you don't plan on crossfiring on a p35 chipset apollo, do a bit of research and you'll see why. Get an x38 instead and then you will see the performance gains. But even still, you won't be able to max Crysis out with Crossfired 3850 256's. The texture detail is FAR FAR too great. You cant even reach the very highest settings with Dual 3870x2s crossfired. But I'm pretty sure that's a driver issue, as the quad GPU drivers are still new. PS: Just though I'd add that the 3870x2 is the fastest card available to gen consumers.