AMD ATI Radeon R7 350X 4GB GDDR5 PCIe 3.0 x16 DVI-I Displayport Low-Profile Desktop Graphics Video Card N81X7 0N81X7 CN-0N81X7.AMD Model Number: Radeon R7 350XDell Part Number: N81X7 0N81X7 CN-0N81X7Compatible Part Numbers: 109-C87251-01 C872Specifications:Memory:- Memory Size: 4GB GDDR5Bus Interface:- PCIe 3.0 x16API Supported:- OpenGL 4.4- DirectX 11.1Output:- 1x Displayport- 1x DVI-I