RADEON™ HD 3870 Chipset Features and Specifications

• 666 million transistors on 55nm fabrication process


• PCI Express 2.0 x16 bus interface


• 256-bit GDDR3 memory interface


• OpenGL 2.0 support


• Bus Memory Controller
  -Fully distributed design with 512-bit internal ring bus for memory reads and writes


• Microsoft® DirectX® 10.1 support
  - Shader Model 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
  - 320 stream processing units
  - 128-bit floating point precision for all operations
  - Command processor for reduced CPU overhead
  - Shader instruction and constant caches
  - Up to 80 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
  - Physics processing support


• Dynamic Geometry Acceleration
  - High performance vertex cache
  - Programmable tessellation unit
  - Accelerated geometry shader path 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) for improved quality
  - Adaptive super-sampling and multi-sampling
  - Temporal anti-aliasing
  - Gamma correct
  - Super AA (ATI CrossFire™ configurations only)
  - All anti-aliasing features compatible with HDR rendering


• 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
  - Bicubic 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


• CrossFire Multi-GPU Technology
  - Scale up rendering performance and image quality with 2 or more GPUs
  - Integrated compositing engine


• ATI PowerPlay™
  - Advanced power management technology for optimal performance and power savings
  - Performance-on-Demand
  - Central thermal management - on-chip sensor monitors GPU temperature and triggers thermal actions as required


• ATI Avivo™ HD Video and Display Platform
  - Dedicated unified video decoder (UVD) for H.264/AVC and VC-1 video formats
  - Hardware MPEG-1, MPEG-2, and DivX video decode acceleration
  - ATI Avivo Video Post Processor
  - HDMI output support
  - Two integrated DisplayPort™ output supports
  - Two integrated 400 MHz 30-bit RAMDACs
  - Two integrated dual-link DVI display outputs
  - Two independent display controllers
  - Integrated AMD Xilleon™ HDTV encoder
  - MPEG-2, MPEG-4, DivX, WMV9, VC-1, and H.264/AVC encoding and transcoding
  - Seamless integration of pixel shaders with video in real time
  - VGA mode support on all display outputs


•  HDCP - High-bandwidth Digital Content Protection
  HDCP is a content protection specification to protect digital entertainment content across the DVI/HDMI interface. The HDCP provides a robust, cost-effective and transparent method for transmitting and receiving digital entertainment similar to DVI/HDMI-compliant digital displays. HDCP encrypts the data transmitted between the DVI/HDMI connector on the graphics adapter and the display. To provide this support, both the graphics adapter and the display need to have an HDCP transmitter and receiver respectively.


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  PERFORMANCES
  • Memory interface: 256-bit x 2
  • Engine Clock Speed: 850MHz
  • Memory Clock Speed: 1800MHz
  • Stream Processing Units: 320 x 2
  • Texture Units: 16
  
  

  
  
  
  
  
  
  

  • All brand name & products are registered trademarks of their respective companies. • All Chipset specs are derived from ATI data sheet. For your reference only.

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