Does anyone else get a sharp difference in FPS in Dominion? I really would like to play it, but my FPS drops to >10

I play at around 30-40 FPS in the old maps, dominion I get 5....

I was having some issues; I simply turned down my league of legends video settings and they were fixed. Alternatively, trying setting the process "leagueoflegends.exe" as a higher priority in your task manager.
(have to be in a match to do this as it's a different window to the client.

Same issue here, going down from 20-30 to 10-20 frames. And i'm doing everything to get a good performance:
http://na.leagueoflegends.com/board/....php?t=1270066