in theory, you can get there.

if you are using keyclone to run your apps, set the maxfpsbk to something like 8... and the maxfps to 25 or so (24 == movies, 30 == tv)

also, before you do anything, run a single wow... go to options/video/effects and reduce your video settings to low. tweak the view distance if you pvp. then exit COMPLETELY... this will force the settings to be written to disk. then start all your wows.

this should help reduce each wows computational requirements