ASUS NVIDIA GeForce GT720 - GT720- 2GD3-CSM - 2048MB GDDR3 PCI Express 2.0 OpenGL 4.3 797MHz 64 bit. Exclusive ASUS-designed heatsinks with large surface areas effectively cool graphics cards passively so absolutely no sound is produced while running-perfect for high definition and silent home theater PCs and multimedia centers. Exclusively-formulated alloy components boost performance by reducing power loss enhancing durability and achieving cooler operation. NVIDIA Adaptive Vertical Sync adjusts VSync to current frame rates for maximum playability. Microsoft Windows 8