NVIDIA GeForce GTS 450 512MB DDR5 PCI Express (PCI-E) DVI Video Card w/HDMI, DisplayPort & HDCP Support NVIDIA GeForce GTS 450 512MB GDDR5 PCI Express Video Card General Features: NVIDIA GeForce GTS 450 graphics processing unit (GPU) 192 CUDA cores 810 MHz core clock 1620 MHz shader clock 512 MB GDDR5 memory 3608 MHz memory clock 128-bit memory interface PCI Express 2.0 x16 interface NVIDIA CUDA technology NVIDIA PhysX technology NVIDIA 2-way SLI-Ready