RADEON HD 3870 Chipset Features and Specifications

• 666 million transistors on 55nm fabrication process
• PCI Express 2.0 x16 bus interface
• 256-bit GDDR3/GDDR4 memory interface
• Bus Memory Controller
  -Fully distributed design with 512-bit internal ring bus for memory reads and writes
• Microsoft DirectX 10.1 support
  - 2x/4x/8x modes.
  - Sparse multi-sample algorithm with gamma correction, programmable sample patterns, and centroid sampling.
  - Temporal anti-aliasing.
  - Adaptive anti-aliasing mode.
  - 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
• 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
• OpenGL 2.0 support
• Unified Superscalar Shader Architecture
  - 320 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 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
• 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
• 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.
• CrossFire Multi-GPU Technology
  - Scale up rendering performance and image quality with 2 or more GPUs
  - Integrated compositing engine
  - High performance dual channel interconnect

   

  PERFORMANCES
  Memory interface: 256-bit
  Engine Clock Speed: 800MHz
  Memory Clock Speed: 2250MHz
  Stream Processing Units: 320
  Texture Units: 16
  
  

   

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