Slowdown

Originally posted by simon: For some reason after playing 5 or 6 turns my game starts to slowdown. Very noticeable during animations etc. This behaviour is very strange as I've played for a fairly long time (150 hrs) and it's only recently started behaving this way. I haven't changed my PC / graphics card etc. Tried rebooting and the same thing keeps happening. Any suggestions?

Make sure you have gotten all of your updates, prioritizing graphics card drivers and OS updates.