ATI Radeon HD 5870 1GB GDDR5 Dual Mini DisplayPort DVI PCI-Express x16 Graphics Video Card ATI-102-C07804.ATI Model Number: Radeon HD 5870ATI Part Number: ATI-102-C07804Compatible Part Numbers: 102C0780400 7121C870H0GSpecifications:GPU Model: Radeon HD 5870Interface: PCI-ExpressMemory Size: 1GBPorts:2 Mini DisplayPort1 DVI