DDR3 RAM will probably only benefit you in a AM3 motherboard with only a few percent advantage at best (like perhaps a 5% advantage compared with DDR3 -1600 or a 3 % advantage with DDR3-1333.Myself I have a Phenom II X3 740 CPU in a Foxconn Cinema Premium AM3/AM2+/AM2 AMD 785G HDMI Micro ATX AMD Motherboard and am using some spare DDR2-800.I am quite satisfied with it.
You are holding your CPU back only slightly but it's not really cost effective for you to get a AM3 motherboard if your AM2+ motherboard is working fine.
tyme writes: Thanks for the information....///......I didn't know the DDR3 % advantages. I'm satisfied with mine also, not cost effective , at this point. Again Thanks!!!