I have a Ti4600.
The in-game gamma and brightness settings are set to highest and it is still too dark when switching to OpenGl and D3D games.
The situation improved somewhat but nowhere near enough in a recent driver release - I don't know which ones.
If the brightness is turned up on the monitor then the desktop is blidingly bright when switching back.
A third party utility like powerstrip is essential just to be able to play games on the top of the line nvidia product. Shameful.
The piccie of the vsync option in D3D is nice - I have that too. But only after installing coolbits!
I was holding out for an NV30 to replace my 3 remaining Voodoo 5 cards, but I am getting so ticked off by this I am about ready to jump ship and try the new 9700.