Yet another thing to consider is the max TDP that an AM2/AM2+ board will support. Many of the earlier boards, even with a BIOS update for PII support, only offer support up to a 95w TDP. Hell, Newegg was at one time selling an AM2+ board with a combo deal on a 125w TDP Phenom II X4 chip that would not work on the combo deal board !!
So check the specs before dropping the chip in. I was just gifted a Phenom II X4 965 from a friend who doesn't deal with AMD CPUs and I am trying to find a board in my collection to support it. Not looking good, as all I have is an eVGA 730A that WILL support the 125w TDP, but does NOT support virtualization and needs CnQ turned off to run 100% compatible.
Intel i5 2500K@4.3, Gigabyte Z68XP-UD3-iSSD, Powercolor PCS+ 290x 4GB, 2TB Hitachi HDD, Thermaltake Level 10 GT Snow Ed, Corsair H80, Win 7 Pro