ATI Mobility Radeon™ HD 4830 / 4860 Specs 

ATI Mobility Radeon™ HD 4830 / HD 4860 Product Features

• 826 million transistors on 40nm fabrication process
• Unified Superscalar Shader Architecture
• Microsoft® DirectX® 10.1 support
• OpenGL 3.2 support
• 128-bit GDDR5, GDDR3 or DDR3 memory interface (depending on model)
• PCI Express 2.0 x16 bus interface
• 640 stream processing units
• 24x custom filter anti-aliasing (CFAA) and high performance anisotropic filtering
• Dual mode ATI CrossFireX™ multi-GPU support for highly scalable performance
• Dynamic geometry acceleration
• Game physics processing capability
• ATI Avivo™ HD video and display technology¹
  • Unified Video Decoder 2 (UVD 2) for Blu-ray™ and HD Video
  • DVD Upscaling²
  • Dynamic Contrast
  • Built-in HDMI® with 7.1 surround sound support
  • DisplayPort™ with audio

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 128 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)
• 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

ATI Avivo™ HD Video and Display Platform¹

• 2nd Unified Video Decoder (UVD 2)
  • High definition (HD) playback of Blu-ray and HD DVD video
  • Dual stream (HD+SD) playback support (or Picture-in-Picture)
  • DirectX Video Acceleration 1.0 & 2.0 support
  • Enabling hardware decode acceleration of H.264, VC-1 and MPEG-2
  • Hardware MPEG-1 and DivX video decode acceleration
    • Motion compensation and IDCT
• ATI Avivo Video Post Processor¹
  • Enhanced DVD up-scaling (SD to HD)²
  • 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
  • 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
• One integrated LVDS display output
  • Integrated LVDS display outputs for embedded panels
  • Supports 18- and 24-bit digital displays at all resolutions up to 1920x1200 (Dual-Channel LVDS)
• 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
• One integrated 400 MHz 30-bit RAMDACs
  • Supporting analog displays connected by VGA at all resolutions up to 2048x1536³
• DisplayPort™ output support
  • 24- and 30-bit displays at all resolutions up to 2560x1600³
• HDMI® output support
  • Supports 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, DTS, DTS-HD & Dolby True-HD, enabling a plug-and-play audio solution over HDMI®⁵

ATI PowerPlay™ 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 CrossFireX™ Multi-GPU Technology⁷

• Scale up rendering performance and image quality with two GPUs
• Integrated compositing engine
• High performance dual channel bridge interconnect⁸