Introduction

A little while ago we took a look at the Sapphire Radeon X1300 XT video card. It proved to be a great midrange card, especially for the price. Well today we will be talking a look at its bigger brother on the high-end; the Radeon X1900 XT. I was really excited to get the X1900 XT and see what it had to offer. It really changed the way I play games and the feel of those games so let's take a look and see what it can do.

Specs

• 384 million transistors on 90nm

• fabrication process

• Up to 48 pixel shader processors

• 8 vertex shader processors

• 256-bit 8-channel GDDR3

• memory interface

• Native PCI Express x16 bus interface

• Up to 512-bit internal ring bus for memory reads

• 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

• Optimized for performance at high display resolutions, including widescreen HDTV resolutions

• 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 512 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 o 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

• Complete feature set also supported in OpenGLr 2.0

• 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)

• 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 dual-link DVI transmitters

    • DVI 1.0 compliant / HDMI interoperable and HDCP ready*

  • 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 displays

  • 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 Theater 550

CrossFire

• Multi-GPU technology
  Four modes of operation:

  • Alternate Frame Rendering (maximum performance)

  • Supertiling (optimal load-balancing)

  • Scissor (compatibility)

  • Super AA 8x/10x/12x/14x (maximum image quality)

*Specifications are subject to change without notice and may vary depending upon product sku*

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