Here are some numbers tested with unstable build 389 64bit. System is a i5 2500k, 16GB RAM, GTX 670 2GB, Windows 7 64bit. Anti Aliasing level 4. HDR enabled. No AI cars. Max details VRAM 1778MB, System RAM 2000MB, 70fps in cockpit view 7AM Pits High details top four settings, reflections low, rest max. VRAM 1272MB, System RAM 1550MB, 89fps Medium details top four settings, reflections low, rest max. VRAM 1163MB, System RAM 1410MB, 91fps I see no problems at all for 32 bit systems. For cards with less than 2GB VRAM I have no idea how much system RAM they can use.