I'm playing Left 4 Dead on Windows 7 x64. Frame rates are down compared to Vista x64 SP1. Not what I was expecting. Playing both on same low quality settings. I'm running on a Radeon x1600 (MacBook Pro). As far I remember the graphics drivers are the same version under 7 and Vista (i.e. the Boot Camp driver). Does anyone know how to speed things up? Are there newer drivers available for the Radeon X1600 (possibly hacked ones)?