Well, here's the story...whenever I get close to any sprites/particle effects (smoke, fire, etc.) my FPS drops sharply, from 50-60, to below 30. It's most noticeable on the MP40.
Also, this is not a BIA specific problem, as it happens in almost all games that I can think of, except for Source-based games.
Intel Pentium 4 3.0Ghz 512k L2 cache, 800Mhz FSB
Intel D875PBZ Motherboard
ATi Radeon 9800 Pro 128, using the 4.12 Catalyst drivers with the Catalyst Control Center
2GB DDR PC3200 RAM (before you ask, I do a lot of 3D modelling and rendering on the computer, I need the extra RAM to speed up the rendering times and to allow me to do other things while rendering/compiling/whatever)
Also, I have run a Spybot S&D scan and an AdAware scan, came up clean. Also ran a Norton AV scan, came up clean.
Any help would be much appreciated. Thanks.