Ok, this has probably been heard a million times.
I have a voodoo 3000 agp card(yes it sucks but it was free), and i was developing in windows 98. With good frame rates(90-150 fps) But reciently my hardrive crashed, and i decided to install windows 2000. So i did, installed visual studio again, and went to 3dfx and got the new drivers. But now opengl is running in software mode with no acceleration giving me around 4 fps. In 98 you just copied the 3dfx dll over the crappy microsoft one, but in 2000 that doesnt work. as the old crappy ms dll is just overwritten back over the 3dfx one. Anyone have any ideas? thanks.