I think me (using a rather old computer by today's standard), has the biggest buggy game, but even with 5-10 minutes loading time, everything just fine and my campaign map is slow, but not choppy...

I use 1.7 Ghz CPU, RAM 512 Mb, VGA 128 Mb, Windows Xp... and guess, I put everything on low, or medium options, with unit size on large....

They run just fine... but before I play the game... I put every process down except explorer svchost winlogon, and some certain system process....