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Powercolor Radeon HD 4890 850MHZ 1GB 3.9GHZ GDDR5 PCI-E 2XDVI HDTV Video Card

Powercolor Radeon HD 4890 850MHZ 1GB 3.9GHZ GDDR5 PCI-E 2XDVI HDTV Video Card - 41845_l.jpg
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Powercolor Radeon HD 4890 850MHZ 1GB 3.9GHZ GDDR5 PCI-E 2XDVI HDTV Video Card - 41845_l.jpg Customer Photos (0)
PowerColor
Reg. Price: $219.99  CAD
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   SKU:  
41845
   Shipping Weight:   3 lbs
   Part #: AX4890 1GBD5

Features    [ Edit | History ]
  • 956 million transistors on 55nm fabrication process
  • PCI ExpressR 2.0 x16 bus interface
  • 256-bit GDDR5 memory interface
  • MicrosoftR DirectXR 10.1 support
    • ShaderModel 4.1
    • 32-bit floating point texture filtering
    • Indexed cube map arrays
    • Independent blend modes per render target
    • Pixel coverage sample masking
    • Read/write multi-sample surfaces with shaders
    • Gather4 texture fetching
  • Unified Superscalar Shader Architecture
    • 800 stream processing units
      • Dynamic load balancing and resource allocation for vertex, geometry, and pixel shaders
      • Common instruction set and texture unit access supported for all types of shaders
      • Dedicated branch execution units and texture address processors
    • 128-bit floating point precision for all operations
    • Command processor for reduced CPU overhead
    • Shader instruction and constant caches
    • Up to 160 texture fetches per clock cycle
    • Up to 128 textures per pixel
    • Fully associative multi-level texture cache design
    • DXTC and 3Dc+ texture compression
    • High resolution texture support (up to 8192 x 8192)
    • Fully associative texture Z/stencil cache designs
    • Double-sided hierarchical Z/stencil buffer
    • Early Z test, Re-Z, Z Range optimization, and Fast Z Clear
    • Lossless Z & stencil compression (up to 128:1)
    • Lossless color compression (up to 8:1)
    • 8 render targets (MRTs) with anti-aliasing support
    • Accelerated physics processing
  • Dynamic Geometry Acceleration
    • High performance vertex cache
    • Programmable tessellation unit
    • Accelerated geometry shaderpath for geometry amplification
    • Memory read/write cache for improved stream output performance
  • Anti-aliasing features
    • Multi-sample anti-aliasing (2, 4, or 8 samples per pixel)
    • Up to 24x Custom Filter Anti-Aliasing (CFAA)
    • Adaptive super-sampling and multi-sampling
    • Gamma correct
    • Super AA (ATI CrossFireXTMconfigurations only)
    • All anti-aliasing features compatible with HDR renderin
  • Texture filtering features
    • 2x/4x/8x/16x high quality adaptive anisotropic filtering modes (up to 128 taps per pixel)
    • 128-bit floating point HDR texture filtering
    • sRGB filtering (gamma/degamma)
    • Percentage Closer Filtering (PCF)
    • Depth & stencil texture (DST) format support
    • Shared exponent HDR (RGBE 9:9:9:5) texture format support
  • OpenGL 3.0 support
  • ATI AvivoTM HD Video and Display Platform1
    • Unified Video Decoder 2 (UVD) for H.264/AVC, VC-1, and MPEG-2 video formats
      • High definition (HD) playback of Blu-ray and HD DVD video2
      • Dual stream (HD+SD) playback support
      • DirectX Video Acceleration 1.0 & 2.0 support
      • Support for BD-Live certified applications
    • Hardware DivXand MPEG-1 video decode acceleration
    • AIT AvivoVideo Post Processor1
      • Color space conversion
      • Chroma subsampling format conversion
      • Horizontal and vertical scaling
      • Gamma correction
      • Advanced vector adaptive per-pixel de-interlacing
      • De-blocking and noise reduction filtering
      • Detail enhancement
      • Color vibrance and flesh tone correction
      • Inverse telecine (2:2 and 3:2 pull-down correction)
      • Bad edit correction
      • Enhanced DVD upscaling (SD to HD)
      • Automatic dynamic contrast adjustment
    • Two independent display controllers
      • Drive two displays simultaneously with independent resolutions, refresh rates, color controls and video overlays for each display
      • Full 30-bit display processing
      • Programmable piecewise linear gamma correction, color correction, and color space conversion
      • Spatial/temporal dithering provides 30-bit color quality on 24-bit and 18-bit displays
      • High quality pre- and post-scaling engines, with underscan support for all display outputs
      • Content-adaptive de-flicker filtering for interlaced displays
      • Fast, glitch-free mode switching
      • Hardware cursor
    • Two integrated dual-link DVI display outputs
      • Each supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI) or 2560x1600 (dual-link DVI)3
      • Each includes a dual-link HDCP encoder with on-chip key storage for high resolution playback of protected content4
    • Two integrated 400 MHz 30-bit RAMDACs
      • Each supports analog displays connected by VGA at all resolutions up to 2048x15363
    • HDMI output support
      • All display resolutions up to 1920x10803
      • Integrated HD audio controller with support for stereo and multi-channel (up to 7.1) audio formats, including AC-3, AAC, DTS5, enabling a plug-and-play audio solution over HDMI
    • Integrated AMD XilleonTM HDTV encoder
      • Provides high quality analog TV output (component/S- video/composite)
      • Supports SDTV and HDTV resolutions
      • Underscan and overscan compensation
    • Seamless integration of pixel shaderswith video in real time
    • VGA mode support on all display outputs
  • ATI PowerPlayTM Technology6
    • Advanced power management technology for optimal performance and power savings
    • Performance-on-Demand
      • Constantly monitors GPU activity, dynamically adjusting clocks and voltage based on user scenario
      • Clock and memory speed throttling
      • Voltage switching
      • Dynamic clock gating
      • Central thermal management-on-chip sensor monitors GPU temperature and triggers thermal actions as required
  • ATI CrossFireXTM Multi-GPU Technology7
    • Scale up rendering performance and image quality with two, three, or four GPUs
    • Integrated compositing engine
    • High performance dual channel bridge interconnect8
  1. ATI AvivoT HD is a technology platform that includes a broad set of capabilities offered by certain ATI RadeonT HD GPUs. Not all products have all features and full enablement of some ATI AvivoT HD capabilities may require complementary products.
  2. Blu-ray or HD DVD drive and HD monitor required
  3. Some custom resolutions require user configuration
  4. Playing HDCP content requires additional HDCP ready components, including but not limited to an HDCP ready monitor, Blu-ray or HD DVD disc drive, multimedia application and computer operating system.
  5. ATI PowerPlayTM technology consists of numerous power saving features. Not all features may be available in all ATI Radeon HD 4800 Series graphics cards.
  6. ATI CrossFireXTM technology requires an ATI CrossFireX Ready motherboard and may require a specialized power supply.
  7. Dual channel interconnect is not required for ATI CrossFireXTM, and may not be included in all product configurations.


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