and I currently use all lowest settings (even though all the suggested settings range from low to ultra). Yet, when viewing replays at 8x speed, i'll start off at around 50 or so FPS then drop to 15 towards mid-late game. Also, last night I was playing as zerg, and when i had a decent sized army of ling baneling muta on my screen i got 14 FPS. Yet I was playing today as protoss and had almost no FPS drop.
I did that variables.txt FPS limiter thing to get my FPS limited to 60 (yet ingame it shows 62), and 30 for menus.
Any idea why I am getting these gnarly FPS drops? This is a new rig I just built, and I enjoy playing on all lowest settings... It seems like it should be able to run it easy with no FPS drops..