Sli ddr2 775 boards are scarce. I wouldn't build another system around one. Instead, get some cheap ddr3 and go with amd. You can sell your old cpu/board/ram on craigslist or ebay. I also use anandtech. When you switch to a non dell motherboard, your windows won't load without a new coa. Your original windows coa reads a small bios file identifying your motherboard as a geniune dell. Dell gets windows cheaper that way. Check newegg for some of the newer am3+ motherboards. Amd just released the new hudsons with the best onboard graphics ever, requiring a new socket motherboard. Or you can go with the phenom II and am3+ board.