How do you have a 32G ram disk? Whats the hardware?

I run 6 instances with 3.2 duel core athlon but they are 1280X960 and low visual setting and 20fps max, but i do ok.

Well I suppose as you increase video gfx settings not only do you need more gpu power but the cpu still (even from system ram) has to get data to the video card, and more gfx going to mean more data. Also distance is a key gfx setting that makes the biggest difference.

How is wow taking advantage of more then 2 cores, its not made for 4 or 8 cores? You can set it so that it does use all 4 or 8?

Sum core stuffs here:

http://forums.wow-europe.com/thread....sid=1&pageNo=1

The WoW engine is designed with the intention of running on ONE processor core only. Trying to force it to run on multiple cores will only slow it down. The fact Crysis can run with good FPS on your computer is that Crysis' engine is designed for high-end computers. WoW's engine, on the other hand, isn't. So by using a processor which has its total capacity performance split into two different cores, you kill WoW performance.

So instead of using a 1.5ghz dual-core processor (one which runs 1.5ghz on each core), you'd have much better results using a 3ghz single-core processor (hypothetically, I don't have the monetary capacity to test this myself).
Look how much you have to spend to get 3.2GHz like I have:

http://en.wikipedia.org/wiki/Intel_Core_3

Well no doubt I7 is the best, if you have the monies then sure.

Ya all reviews are single instances, our multiboxing needs may required things different.