My game started to lag when I installed The Sims 3 Pets. I did all of those things you said (I even got a powerful new PC lol) and Appaloosa Plains still lags. But, this is not an ordinary lag, when the game freezes, animations, shadows and plumbob are moving while sims and everything else is frozen. I tried to uninstall every EP and SP and install it in exact order but it still lags pretty bad. Any tips?
Thanks in advance!
P.S. I even recorded my problem!
http://www.youtube.com/watch?v=jiW1GekHpfs&feature=plcp¸
I read your solutions and the ''resetsim *'' helped! I can't belive that I've spent 3 hours talking with EA Help and they couldn't solve my problem. Thank you crinirict, you just made my game 100% more enjoyable! :D