I'd go for a g31 chipset; they all use ddr2 and most don't cost more than $50. Your chipset is rare; hasn't been made for awhile. You can find the g31 boards at newegg, computer geeks or numerous other sites. Some p45 boards may also use ddr2, but cost more and require a separate video card. You may have to format and reinstall windows; you'll just have to boot up and try it. If windows gets stuck in a loop, you'll have to format. If your system is oem by dell, hp, etc. then you may need a new windows coa and dvd.