[主機板CPU]請問平台搭配

[coolstarwar]

CPU:PII X2 550
PII X3 720
MB :GA-MA770T-UD3P (AM3版)
GA-MA770-UD3 (AM2+版)
RAM:TWIN3X4G1600C9DHX(DDR3-1600 2G*2)
TWIN2X4096-8500C5D(DDR2-1066 2G*2)

怎樣搭配比較好