KARTA GRAFICZNA AGP

 ATI RADEON X1800XT 

512MB DDR3

512-BIT

AGPx8

D-SUB + DVI + TV-OUT

Radeon X1800 XT

Radeon X1800 XT to najsilniejszy reprezentant nowej rodziny i jednocześnie nowy konkurent dla GeForce 7800 GTX. Testom poddaliśmy kartę referencyjną ATI z dwuslotowym i niestety momentami dość głośnym systemem chłodzenia. Karta miała 512 MB pamięci GDDR3, a jej taktowanie to 625 MHz dla GPU i 1,5 GHz dla pamięci.

Radeon X1800 XT to karta długa i "gruba" - ma 23 cm długości (dokładnie tyle samo, co GeForce 7800 GTX) i dwuslotowy system chłodzenia (dlatego gruba), przypominający ten stosowany na kartach Radeon X850 XT. Wirnik w module chłodzącym potrafi być naprawdę głośny, na szczęście na najwyższe obroty wchodzi tylko przy uruchamianiu (i restartowaniu) komputera. Szkoda jednak, że ATI nie udało się opracować jednoslotowego, cichego systemu chłodzącego, jaki znajduje się na konkurencyjnym 7800 GTX...

Features

• 321 million transistors on 90nm fabrication process
• Ultra-threaded architecture with fast dynamic branching
• Sixteen pixel shader processors
• Eight vertex shader processors
• 256-bit 8-channel GDDR3/GDDR4 memory interface
• Native PCI Express x16 bus interface
• Dynamic Voltage Control

Ring Bus Memory Controller

• 512-bit internal ring bus for memory reads
• Programmable intelligent arbitration logic
• 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 cache optimized for real-time shadow rendering
• Optimized for performance at high display resolutions, including widescreen HDTV resolutions

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 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
  • 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 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)