i have a laptop that is running 2.4 dual core, and i have an nvidia 8600gt 512mb card running it.. I only play wow on this thing, and running around 80fps with everything on high, when i turn the shadows up all the way, it takes it down to around 49 - 60.. I know you can only see 60fps and its a little overkill. I have 2gb 667mhz, the laptop is capable of holding 4gb, will i see any improvement in performance with 4gb, instead of 2gb?