NVIDIA Driver Bug In Doom III On Dual Display Systems
Users running their PC in Dual Display configuration with a NVIDIA 6800 card will face low FPS and drops down to 3-4FPS in some areas of Doom III. But there's a way to fix it.
Source: Tom's Hardware GuideWe've discovered a driver bug with NVIDIAs current drivers v61.76/61x77 in Doom III (we did not test with older drivers yet). It causes a performance drops down to 3FPS in certain parts of a level and a lower overall FPS, when your GeForce 6800 is running with multiple displays in dual view mode - and only on systems running in dual display mode!! If you have only one display attached, everything should be fine! We did not test yet if other cards are also affected.
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