I'd very much doubt you'll see a notable difference tbh.
I'll feed it to the monster that takes care of my media...
Just wondering what would make the best use of it.how have you got the 6Gb configured? your cpu needs a dual channel kit, so if your using 3X2GB sticks then it wont be running at maximum.

Could turn off Windows Page file with 8 gig for a very small boost...
Don't think its worth it mind.