computer geeks has the biostar p4m890-m7 pci-e for $26.99 plus shippiing. It works with your ram and early e6xxx core2 duo cpus, such as the 1066 e6300 which is $70 at starmicro. If you want to upgrade, then sell your old ddr2 and go with ddr3. Newegg has an amd regor 260 cpu retail box with asus M4A785TD-M for $137.99. You can use ocz special ops edition 1600 2x2gb of ddr3 for $64.99 after rebate. So your total would be around $200 for this amd combo. I've used the regor 250, and it's plenty fast for your needs.