Comment Re:Where do run Steam? (Score 1) 353
I was part of the restricted beta, and identified why TF2 fails with older cards. nVidia G71 based cards and older do not support the OpenGL extensions required to run TF2. That's why your 6800 doesn't work.
I run a Dual Xeon X5472 box with a Quadro FX 3500 and Ubuntu 12.04 64-bit, and it runs the Steam client just fine and Red Orchestra 2 mostly fine.