to switch over to am3+ and something like a fx 6300 and 8gb ddr3 low end will cost roughly $250 or $70 for the board, $60 for ram, and $120 for cpu, but if u can find a new 945 or 955 new from tigerdirect or a different site for under $100 do it. but max it can prob take is the 955 as its the highest 95watt cpu, but there are 125watt versions of it. I got my friends 945 for $80 off tigerdirect new. U can also go with the Athlon II X4 640, which is a 95watt cpu and is basically the phenom 945 without l3 cache and is basically a 3.0ghz quad core version of ur dual core