Been having a problem with some menus/cutscenes in some games (dynasty warriors 4 hyper/warhammer 40000 dawn of war/need for speed most wanted/the matrix path of neo) having framerates measurable in spf (i.e. very slow.) The in-game graphics are fine, running smoothly at high quality settings, but certain cuts and menus jerk along sluggishly, not responding well to keyboard input. Have tried updating drivers/games, to no avail. Don't know what to try next. Any suggestions?