I read this from a web site

I have been playing World of Warcraft quite a bit lately. In fact, I've been multiboxing--playing with five characters at a time. Yea, I know this makes me quite the nerd.

Luckily, I can do all this with one computer, unlike the old days when multiboxing could only be done with several computers. My system has an AMD Athlon X2 64 Dual 4800+ processor with 2GB of RAM and a striped volume set up using two hard drives and the Windows Disk Management utility. My video card is an NVIDIA GeForce 8800 GT with 512MB of RAM, and I have a 21" LCD screen running at 1680x1050.
Now I dont have the striped volume setup but these are my system specs


AMD athlon 64 x2 dual core 5000+ 1.8 GHz 2gb ram video card is a ATI radeon hd 4870 not sure on the gpu ram i forget
displays are 21" 1280x1024 and a 19" 1280x1024

i run 2 toons
main screen is
full screen
fps cap set to 30
mid lvl graphics
res 1280x1024


second screen is
slave toon set to window size 1024x819
fps cap set to 10
mid lvl graphics
game res at 1280x1024


and i lag sometimes and when i check my system it says cpu is at about 85% steady with 100% spikes
I started a third account once and ran all settings an low for all accounts with the main full screen and the other 2 sharing the second screen at 1/4 screen size each one top left and one top right corner of the screen and it kept cpu at 100% i was afraid i would cook the system so i never used the third account past trial

i use hotkeynet to size windows and broadcast keys and mouse and my fps settings i use the macro
/console maxfps 30
/console maxfpsbk 10

anything over this fps setup and the second window sized down to 3/4 of the second screen and its nearly unplayable

what gives what am i doing wrong ive boxed for over a year now and was content with 2 and the thought that i need a better system but this post ive read makes me a bit unhappy with the performance of my system