ATI Radeon™ HD 4830 Series GPUs bring the power of graphics ‘supercomputing’ to gamers, setting a new standard for visual computing. Redefine the way you play and take HD gaming to the extreme with best-in-class performance. With one teraFLOPS on tap, the TeraScale graphics engine delivers an immersive, cinematic gaming experience. Add this graphics card to your PC and watch Blu-ray movies and play HD content with incredible visual fidelity or take your experience to another level with new multimedia capabilities. Do it all with break-through efficiency that doesn’t compromise performance.

956 million transistors on 55nm fabrication process

PCI Express 2.0 x16 bus interface

256-bit GDDR3 memory interface

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

• 640 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 and Fast Z Clear
  
• Lossless Z & stencil compression (up to 128:1)
  
• Lossless color compression (up to 8:1)
  
• Up to 8 render targets (MRTs) with anti-aliasing
  
• Accelerated physics processing

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
  
• Gamma correct
  
• Super AA (ATI CrossFireX™ 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
  
• 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 2.1 support