BIOSTAR TFORCE TF520-A2 AM2 NVIDIA nForce 520 MCP ATX AMD Motherboard direct newegg link
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138082
with this video card
ASUS ENGTX550 TI DC/DI/1GD5 GeForce GTX 550 Ti (Fermi) 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121435
http://www.newegg.com/Product/Product.aspx?Item=N82E16813138082
with this video card
ASUS ENGTX550 TI DC/DI/1GD5 GeForce GTX 550 Ti (Fermi) 1GB 192-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121435