Went from 6 x 1gb to 6 x 4gb and wow what a difference. Installed the ram and everything booted without a problem. Using the memory on a ASUS P6T DELUXE V2 Board and Intel i7 920 processor. From the first boot the memory was detected automatically and setup at the appropriate speed. I've put a lot of tress on the memory already with simultaneously open copies of Premiere CS5 and After Effects CS5 rendering files and what previously would have been an impossible task is now an easy one. All with plenty of free ram to spare. At this price why not upgrade? Wish I would have a long time ago!