Zotac NVIDIA GeForce 8400 GS 256MB GDDR3 PCIe 2.0 x16 Video Card ZT-84GED2M-HSL Core Clock Speed 567MHz RAMDAC Clock Speed 400MHz Shader Clock 1400MHz Video Memory 512MB Memory Type DDR3 Memory Bandwidth 6.4GB/sec DirectX Support DirectX 10 Memory Bus 64-bit