I've been recently teaching myself the capabilities of ESXi on Mac hardware now that lion is supported in order to evaluate the possibilities for my client base. In the process, I've been testing its limits. I currently have it set up with a Lion Server guest VM, along with a couple of others. As a test of its limits, I've set the Radeon 5870 to pass through to the guest lion system. To my surprise, it's functioning well, as I suspected to to completely bomb initially. My issue is that, while I appear to have quartz extreme functioning and benchmarking at about 80% of native OS X, OpenGL is benchmarking as significantly crippled. While researching, I found that OS X is listing the GPU generically as a Radeon 5000 with the proper amount of VRAM, so I'm suspecting that it may be driver-related. I know it's a stretch, but does anyone have any insight on possible solutions to this? I'm not under the impression that I'm magically going to have some virtualized gaming rig, but I would be excited to make any progress to have OpenGL performance improved.