GPU RADEON 9550 Memory 256MB DDR SDRAM 128-bit BUS AA SAMPLES PER SECOND 7.8G samples/sec MEMORY BANDWIDTH 6.4 GB/sec PIXEL PIPELINES 4 pixel pipelines PIXEL FILL RATE 1.3G pixels /sec SUPPORT DIRECTX 9.0 SUPPORT OPENGL 1.5 RAMDACS 400 MHz DACs OUTPUT DVI-I / TV-Out / D-Sub OPERATING SYSTEMS Microsoft® Windows® XP, Microsoft® Windows® 2000 BUS AGP 8X/4X