ATI Radeon™ X1550 Specifications 

Features 

• 105 million transistors on 90nm fabrication process
• Four pixel shader processors
• Two vertex shader processors
• 128-bit 4-channel DDR/DDR2/GDDR3 memory interface
  • 32-bit/1-channel, 64-bit/2-channel, and 128-bit/4-channel configurations
• Native PCI Express x16 bus interface
  • AGP 8x configurations also supported with external bridge chip
• Dynamic Voltage Control

High Performance Memory Controller

• Fully associative texture, color, and Z/stencil cache designs
• Hierarchical Z-buffer with Early Z test
• Lossless Z Compression (up to 48:1)
• Fast Z-Buffer Clear
• Z/stencil xache optimized for real-time shadow rendering

Ultra-Threaded Shader Engine

• Support for Microsoft® DirectX® 9.0 Shader Model 3.0 programmable vertex and pixel shaders in hardware
• Full speed 128-bit floating point processing for all shader operations
• Up to 128 simultaneous pixel threads
• Dedicated branch execution units for high performance dynamic branching and flow control
• Dedicated texture address units for improved efficiency
• 3Dc+ texture compression
  • High quality 4:1 compression for normal maps and two-channel data formats
  • High quality 2:1 compression for luminance maps and single-channel data formats
• Multiple Render Target (MRT) support
• Render to vertex buffer support
• Complete feature set also supported in OpenGL® 2.0

Advanced Image Quality Features

• 64-bit floating point HDR rendering supported throughout the pipeline
  • Includes support for blending and multi-sample anti-aliasing
• 32-bit integer HDR (10:10:10:2) format supported throughout the pipeline
  • Includes support for blending and multi-sample anti-aliasing
• 2x/4x/6x Anti-Aliasing modes
  • Multi-sample algorithm with gamma correction, programmable sparse sample patterns, and centroid sampling
  • New Adaptive Anti-Aliasing feature with Performance and Quality modes
  • Temporal Anti-Aliasing mode
  • Lossless Color Compression (up to 6:1) at all resolutions, including widescreen HDTV resolutions
• 2x/4x/8x/16x Anisotropic Filtering modes
  • Up to 128-tap texture filtering
  • Adaptive algorithm with Performance and Quality options
• High resolution texture support (up to 4k x 4k)

Avivo™ Video and Display Platform

• High performance programmable video processor
  • Accelerated MPEG-2, MPEG-4, DivX, WMV9, VC-1, and H.264 decoding and transcoding
  • DXVA support
  • De-blocking and noise reduction filtering
  • Motion compensation, IDCT, DCT and color space conversion
  • Vector adaptive per-pixel de-interlacing
  • 3:2 pulldown (frame rate conversion)
• Seamless integration of pixel shaders with video in real time
• HDR tone mapping acceleration
  • Maps any input format to 10 bit per channel output
• Flexible display support
  • Dual integrated DVI transmitters (one dual-link + one single-link)
    • DVI 1.0 compliant / HDMI® interoperable and HDCP ready¹
  • Dual integrated 10 bit per channel 400 MHz DACs
  • 16 bit per channel floating point HDR and 10 bit per channel DVI output
  • Programmable piecewise linear gamma correction, color correction, and color space conversion (10 bits per color)
  • Complete, independent color controls and video overlays for each display
  • High quality pre- and post-scaling engines, with underscan support for all outputs
  • Content-adaptive de-flicker filtering for interlaced displays
  • Xilleon™ TV encoder for high quality analog output
  • YPrPb component output for direct drive of HDTV displays²
  • Spatial/temporal dithering enables 10-bit color quality on 8-bit and 6-bit displays
  • Fast, glitch-free mode switching
  • VGA mode support on all outputs
  • Drive two displays simultaneously with independent resolutions and refresh rates
• Compatible with ATI TV/Video encoder products, including ATI Theater™ 650

CrossFire™

• Multi-GPU technology
  • Inter-GPU communication over PCI Express (no interlink hardware required)
• Four modes of operation:
  • Alternate Frame Rendering (maximum performance)
  • Supertiling (optimal load-balancing)
  • Scissor (compatibility)
  • Super AA 8x/10x/12x/14x (maximum image quality)

HyperMemory™ 2***

• 2nd generation virtual memory management technology
  • Improved PCI Express transfer efficiency
• Supports rendering to system memory as well as local graphics memory