I haven't been multiboxing long, but I am running 4 accounts on my laptop which has a dual core 2.5 running at 800mhz and an Nvidia Geforce 9500M GS with 4gigs of ram on Vista 64bit. I use keyclone and set the affinity to main and slave 1 on core 0 and slaves 2 and 3 on core 1. I did notice the cpu usage went down using the task manager with all four up. I tried to run them all with the maximizer with all kinds of settings and found the best one was to max the screens out on all to 920x1050 (allows me to see and use the taskbar) I then minimize any window I'm not using as the main focus to lessen the strain on the video card and it works. Helps to set the ingame camera to look at the ground will all settings set to minimum on all slaves. If you are looking up at the sky on any slaves, it will slow down. My main account is the only one I have set the settings up on high on, but may lower for better fps. Makes sure you turn off the Specular Lighting and Full Screen Glow Effect and turn down the Shadow Quality to low if you are seeing a drag in your fps. These cause a massive strain no matter where you are. Dalaran was the worst for me. Still is actually, so I only go there with one toon at a time. The link to my laptop is below. I got it from Newegg.com, but now they are no longer offering these.

My toy: http://www.newegg.com/Product/Produc...82E16834115475

Oh yea. One more note. Multiboxing on the go freakin ROCKS! ;D