I recently purchased a 2.0 ghz MacBook and upgraded it to 2 gigs of ram (matched pair, I even tested the memory). After installing bootcamp (the latest version as of 2 days ago), I installed Unreal Tournament (and other games using d3d). The first time I played the game(s), the performance was amazing, steady framerates. Second time around, it was horrible. Choppy, tearing, artifacts, the game was unplayable. OpenGL games seem to run fine.
I checked the control panel of the Intel video card drivers, put everything as far away from "more battery life" as possible, no changes. I was wondering if anyone was experiencing these problems.