HIS AMD Radeon HD6770 1GB HDMI DisplayPort Dual DVI PCI-Express 2.1 x16 Graphics Video Card H677FN1GD.AMD GPU Model Number: Radeon HD 6770HIS Part Number: H677FN1GDSpecifications:Interface: PCI Express 2.1 x16Chipset Manufacturer: AMDGPU: Radeon HD 6770Core Clock: 850 MHzStream Processors: 800Memory Size: 1GBMemory Interface: 128-BitMemory Type: GDDR5Effective Memory Clock: 1200MHz (4.8Gbps)3D API:DirectX 11OpenGL 4.1Ports:1 HDMI1 DisplayPort2 DVIRAMDAC: 400MHzMax Resolution: 2560 x 1600Dual-Link DVI Supported: YesHDCP Ready: YesEyefinity Support: YesCrossFireX Support: YesCooler: With FanPower Connector: 6-PinSystem Requirements: Minimum of a 450 Watt power supply.