XFX Double Dissipation R9-290X-EDFD Radeon R9 290X 4GB 512-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card XFX Dual Fan design for optimal cooling Lifetime warranty with registration within 30 days of purchase 4GB GDDR5 Memory 5000 MHz Effective Memory Clock PCI Express 3.0