depend on your budget. I have my 630 with a cheapo Asus P5P800 @3.9Ghz. I guess you are going to re-use AGP, then you are going to re-use your DDR Ram as well right ?? If so, DDR II motherboard is out of the question. Then there are not so many choices left though. I say go with Asus P5P800 or Abit AS8