It is a AGP heres the specs, ATI RADEON X800 PRO 256MB AGP VIDEO CARD
160 million transistors on 0.13 micron low-k fabrication process
Up to sixteen extreme parallel pixel pipelines
Six programmable vertex shader pipelines
256-bit quad-channel GDDR3 memory interface
AGP 8X support
Support for Microsoft® DirectX® 9.0 programmable vertex and pixel shaders in hardware
DirectX® 9.0 Vertex Shaders
Vertex programs up to 65,280 instructions with flow control
DirectX® 9.0 Extended Pixel Shaders
Up to 1,536 instructions and 16textures per rendering pass
2nd generation F-buffer technology accelerates multi-pass pixel shader programs with unlimited instructions
32 temporary and constant registers
Facing register for two-sided lighting
128-bit, 64-bit & 32-bit per pixel floating point color formats
Complete feature set also supported in OpenGL® via extensions
2x/4x/6x Anti-Aliasing modes
Lossless Color Compression (up to6:1)at all resolutions, including widescreen HDTV resolutions
Temporal Anti-Aliasing
2x/4x/8x/16x Anisotropic Filtering modes
Up to 128-tap texture filtering
Adaptive algorithm with bilinear (performance) and trilinear (quality) options
3Dc™
High quality 4:1 Normal Map Compression
Works with any two-channel data format
3-level Hierarchical Z-Buffer with Early Z Test
Lossless Z-Buffer Compression (up to 48:1)
Z Cache optimized for real-time shadow rendering
Seamless integration of pixel shaders with video in real time
FullStream™ video de-blocking technology for Real, DivX, and WMV9 formats
VideoSoap™ noise removal filtering for captured video
MPEG1/2/4 decode and encode acceleration
DXVA Support
Hardware Motion Compensation, iDCT, DCT and color space conversion
2D DISPLAY MODES
Resolutions, colors and maximum refresh rates (Hz) in 256, 65K or 16.7M colors