Hello, I was wondering if there is a performance difference using an AMD Phenom 2 x6 with a AM3/AM2+/AM2 motherboard vs just an AM3 motherboard. Was thinking about the AM3 one so I can use DDR3 as well.
There will be no appreciable difference.
As Malmental noted though, if you do get an AM3 board and DDR3 memory, you will be able to keep the DDR3 memory for a future upgrade in motherboard and CPU. And DDR3 prices are very low right now.