5850
4gb ddr3
Okay so I've been playing the singleplayer and multiplayer just fine usually 45-60fps. In fact I was able to run the singleplayer at 1980 resolution on my second screen to show my friend, without it dipping below 45. I normally game at 1680x1050.
but....now i stay below 40 and usually get between 22-28fps...which is unacceptable. I reverted all of my settings back, deleted my autoexec and system.cfg and removed all launch otions but the problem persists. Anyone else have this happen? Wanted to know what's up before I do a full reinstall, which will probably fix it.