AMD CrossFireX™ Certified Graphics Cards Details 

Title:MSI R4850 1GB GDDR3
Manufacturer:MSI
Product Supported:ATI Radeon™ HD 4850
Memory:1GB
Bus:PCI-E

Connectors:DVI-I

Where to Buy:http://www.google.com/products?q=msi+R4850+1gb&aq=f