If I were to pick the cheapest conroe out there, the cheapest conroe motherboard out there, the cheapest 1GB stick of DDR2 800 to go with the conroe and mobo, and a semi-decent but not top-of-the-line card (Ge6800), all of which would be required to update my current non-conroe DDR AGP system, it would cost me well over $600!
YIPES