no, i use it on my 7 and xp comps., and by default all processes are on normal priority, open task manager and right click on an app, then select go to process, then right click on that process and at the bottom or middle will be both the priority and affinity(usable cores) for the program. try it out and see if it changes anything, because i use an integrated card and a pentium i get lag between moving the mouse and it showing i did and this helps me alot and in mmo's like rift and wow it helped a lot too, so in theory, or at least mine, it should help and it can't hurt. well i don't think it can.
and i do agry on 1000 for a cpu being a waste unless you're doing super heavy programs that are threaded or whatever it's called for multiple cores and a lot of them, if i had 5k for a build i'd get a 2600k, those cores won't help as much as sandybridge, benches on anandtech show the i5 2400 beating that in most catagories.
and 1 time i oc'd from my pentiums 200x11 to 230x11 and it seemed fine for eny and everything, till i played a game and it was moving weird, so i lowered it to 226 and it was fine, so try lowering it a little aand see what happens