jhalada,yb I remember there was an Opteron & Athlon 64 Assymetric Low Cost Desk-top on slide 47 of the Platform Conference presentation. I couldn't find it on AMD's web site but google showed this: http://130.236.229.26/download/misc/AMD-Opteron.ppt if you don't consider this design outdated ... Do you have any idea why Athlon 64 is connected to Reg DDR?