Allright I changed my settings in the WTF folder to use all cores, and I am only using 1 directory for all 5 wows now.

It helped SOO much! :P
I just got a smile on my face when walking in shattrah and AV with barely any lag at all!
I will still buy a new GPU tho just to make it even better

Great replies everyone and thanks for helping this newbie out! :thumbsup: