My setup.. 5-Boxing - One monitor, 2GB ram, Single Core ;)

Might be the ram?

I make sure I reboot just before multiboxing and close all extra programs...

Not sure other than that.

How much ram is on your video card? 256?

Also check out guru3d.com

I am using some Optimized NVIDIA Drivers from a group called DNA and its fixed my FPS issues. I still have slight 'stutter' problems where I will be running at 60fps and my screen will pause for a millisecond then resume, with no drop in FPS --- bit absurd.

Upgrading to a 'real' sound card for my Dell Laptop has helped. I run a Dell XPS 1710 as my 'main' PC. Have a 512MB 7950GTX in it and all my performance issues started after 2.2/2.3 and the update of the sound engine.

I upgraded to 3gb ram, and a dual core processor (X2 3800+) ... That improved things a lot.

My main is at 35fps (most of the time, even in citys it's 20fps+). My alts are at 10fps. Personally, I find that very playable. 30fps is the critical point for me. I know a lot of people like 50+, but 30+ is all I need. :)


ps: the dual core processor is what made the difference, not the ram.