One dual core has a cache configuration of 256kb x 256kb. The other has a cache configuration of 512kb x 512 kb. Both are 1.6 MHz. If I just run both at stock speeds with 2 gigs of 667 DDR2 RAM what am I gaining with the 512 cache? In other words, how much of a noticible diffrence is there in performance with such things as Office applications, internet bowsing, and video editing and DVD watching as well as burning? Thanks.