ATI Radeon™ HD 3800 Series

ATI Radeon™ HD 3800 Series – Overview
Experience the power of HD
Experience the power of HD with the ATI Radeon HD 3800 Series of GPUs - graphics processing designed for how you work and play.
Advance to the Next Generation of HD Gaming
Advance to the next generation of gaming with incredible performance, life-like graphics and support for the latest Microsoft® DirectX® 10.1. With PCI Express® 2.0 support, you’re ready for games that will demand faster throughput. And thanks to plug-and-play ATI CrossFireX™ upgradeability, it is easy to turbo-charge your 3D performance.
Download the ATI Radeon™ HD 3800 Series and Microsoft® DirectX® 10.1 whitepaper


Screenshot from Tabula Rasa - ©2007 NCsoft Corporation

HD Video Beyond 1080p
The latest Blu-ray and HD DVD movies play smoothly at full 1080p and your CPU is unbound for other tasks thanks to the Unified Video Decoder and ATI Avivo™ HD video and display technology. Enjoy quality to spare with resolutions upscaled beyond 1080p for the most processing-intensive content. And with a choice of digital outputs, you have more options when enjoying your digital entertainment.
Download the ATI Avivo™ HD - Video Technology Brief
Learn more about ATI Avivo™ HD

Break-through Efficiency
ATI Radeon™ HD 3800 Series graphics processors have break-through efficiency, with up to twice the processing performance per watt than previous generations of AMD GPUs. And thanks to a smaller format that runs cooler, you can pack more performance in your system at an extraordinary value.

ATI Radeon HD 3800 Series – Key Features
PCI Express® 2.0 – Get ready for the most demanding graphics applications with PCI Express 2.0 support, which allows up to twice the throughput of current AMD PCI Express cards.
Incredible Microsoft® DirectX® 10.1 performance – You’ll be blown away by life-like graphics from the latest DirectX® 10.1 games, with stunning 3D graphics and shading effects.
320 Stream Processors – More than enough horsepower to support the most demanding graphics applications.
ATI CrossFireX™ multi-GPU – Upgrade to even greater 3D performance quickly and easily thanks to plug-and-play ATI CrossFireX technology with up to quad-GPU support.
Unified Video Decoder – View and manipulate the latest Blu-ray and HD DVD content with a dedicated hardware video decoder that leaves your CPU free to perform other tasks.
Ultimate Image Quality – Performance that rivals high-end HD-DVD and Blu-ray players on displays with resolutions that exceed 1080p – up to 2560x1600.
Integrated Digital Outputs – Enjoy your digital content the way you want to, with built-in HDMI that includes 5.1 surround audio for big screen entertainment.
More Processing Performance per Watt – Get up to twice the Gigaflops per watt of previous generations of high-end AMD GPUs.
ATI PowerPlay™ Technology – power saving features that reduce power consumption at idle or during low-usage
Runs Cool and Quiet – With a smaller chip designed to use less power, your system can take advantage of high-end Windows Vista® features while running more efficiently and quieter than ever.



ATI Radeon™ HD 3800 Series - GPU Specifications
666 million transistors on 55nm fabrication process
PCI Express 2.0 x16 bus interface
256-bit GDDR3/GDDR4 memory interface
Ring 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
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
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
OpenGL 2.0 support
ATI Avivo™ HD Video and Display Platform
Dedicated unified video decoder (UVD) for H.264/AVC and VC-1 video formats
High definition (HD) playback of both Blu-ray and HD DVD formats
Hardware MPEG-1, MPEG-2, and DivX video decode acceleration
Motion compensation and IDCT
ATI Avivo Video Post Processor
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
Inverse telecine (2:2 and 3:2 pull-down correction)
Bad edit correction
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)2
Each includes a dual-link HDCP encoder with on-chip key storage for high resolution playback of protected content3
Two integrated 400 MHz 30-bit RAMDACs
Each supports analog displays connected by VGA at all resolutions up to 2048x15362
DisplayPort output support4
Supports 24- and 30-bit displays at all resolutions up to 2560x16002
HDMI output support
Supports all display resolutions up to 1920x10802
Integrated HD audio controller with multi-channel (5.1) AC3 support, enabling a plug-and-play cable-less audio solution
Integrated AMD Xilleon™ HDTV encoder
Provides high quality analog TV output (component/S-video/composite)
Supports SDTV and HDTV resolutions
Underscan and overscan compensation
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
ATI PowerPlay™
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 Technology
Scale up rendering performance and image quality with two, three, or four GPUs
Integrated compositing engine
High performance dual channel bridge interconnect1

1 Dual channel interconnect is not required for ATI CrossFire, and may not be included in all product configurations
2 Some custom resolutions require user configuration
3 HDCP support for playback of protected content requires connection to a HDCP capable display
4 Requires external DisplayPort transmitter


Source : http://ati.amd.com/products/radeonhd3800/specs.html