Are these inter-compatible? I've found a board which is listed as supporting all 3 ( http://www.newegg.com/Product/Product.a ... 6813138130 ), and want to make sure that is really the case as I've come across some conflicting info on that (that AM3 only works with DDR3).

My wife's computer currently has an Athlon 64x2 and DDR2 RAM in it. She needs a new board and I'm considering that one as I see it as a way to open up for a CPU upgrade (to a Phenom 2) that would later on allow for MB + RAM upgrade (to DDR3).

Also, what kind of power source would be required for a Phenom II, board, 6GB DDR3, 2 SATA HDDs, ATI Radeon 4870, 1 DVD-RW?