I've been running Lion for a while (developer) and have had an interesting problem that is still present in the GM builds, so I wanted to compare notes and see if anyone else has it. I have a dual GPU Mac Pro. One GPU is an Apple 5870, and the other is an NVidia 120. This config has freaked Lion out. It's confusing different elements of the two cards. For example, it seems to think my 5870 has 512 megs of VRAM. Frame rates have also suffered massively, it's running slower than my old 8800 GT when I'm running things on my primary display with my 5870. Has anyone else seen this? I'm going to crack open my machine tonight and yank the 120, but it means my VRAM is going to get halved from running both displays.