EVGA GeForce GTX 570 Classified 1280 MB GDDR5 PCI Express 2.0 2DVI/HDMI/Display Port SLI Ready Limited Graphics Card, 012-P3-1578-AR 156 GB/sec Memory Bandwidth 3902 MHz memory clock and 1645 MHz shader clock PCI-Express 2.0 GeForce GTX 570 with 822 MHz core clock 1280 MB 320-bit 0.4ns GDDR5 memory GeForce GTX 570 with 822 MHz core clock PCI-Express 2.0 1280 MB 320-bit 0.4ns GDDR5 memory 3902 MHz memory clock and 1645 MHz shader clock 156 GB/sec Memory Bandwidth NVIDIA 2-way and 3-way SLI ready 49.3 GT/s Texture Fill Rate Microsoft DirectX 11 Support