Quote Originally Posted by 'Hachoo',index.php?page=Thread&postID=165794#post1 65794
I think you'd be better off setting the video to 24 bit, not 16, as weird as that sounds.

Aside from that, one good hint I found was to actually go download the directx 9.0c installer. Even though vista supports directx9 out of the box it uses a dx10 wrapper and doesn't have all of the dx9 libraries which means it actually plays dx9 games (like WoW) slower than dx10 games. If you install dx9.0c it will actually find a bunch of missing files and install them - it sped up wow on my machine. Aside from that I'm assuming your machine running 4 WoWs is a multicore? If so, you are setting the affinity explicitly so 2 WoWs run on each core or what not, right? If you let windows spread the load out it will be very slow.
Thanks for the directx tip - I'll try that out. As for the 16/24 stuff, I get a noticable framerate increase by setting it to 16, the problem is that the setting isn't saved after it's applied (this is intentional from Blizzards side - I saw a few posts on it on the official forum).