[jack-o-bytes]

I am looking to building a computer using the AMD Phenom II X2 550 Black Edition 3.1Ghz 6MB cache and socket AM3. Will this work in an AM3 board with DDR3 memory?

[BG-0]

Yes, but shouldn't really be used in one. DDR3 RAM offers zero real life performance increase compared to DDR2 1066, 1200, etc, and is harder to find compatible.

[crjdriver]

I agree; the ddr2 will save you some money as well. As for selecting the ram, check the board maker's site for tested/approved ram.

Generally as long as you use name brand ie crucial, kingston, or corsair ram, you should be fine however do check the list.

I highly recommend this Gigabyte board It will support AM3s and uses ddr2 ram. I am using this same board running a 940 overclocked to 3.4gig and absolutely stable. Runs prime95 with no errors.

[BG-0]

Instead of checking the (usually) very limited list, Crucial, Kingston and Corsair also all offer a memory search tool on their sites to find compatible RAM for a specified motherboard. Lately, however, they seem to have many holes in the selection of motherboards to find memory for...

[jack-o-bytes]

ok thanks guys.