- Joined
- Apr 17, 2008
- Messages
- 3,935 (0.67/day)
- Location
- West Chester, OH
- Release Date: August 12th, 2008
- Two RV770 GPU's on one PCB
- 2GB of GDDR5 Memory
- 2.4 TeraFLOPS
- 1,600 Stream Processors
- 1.912 Billion Processors
- DirectX 10.1 Support
- Product Link
1.912 billion processors (956 million transistors per GPU on 55nm fabrication process)
PCI Express® 2.0 x16 bus interface
512-bit GDDR3 memory interface (ATI Radeon™ HD 4850 X2)
512-bit GDDR5 memory interface (ATI Radeon™ HD 4870 X2)
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 F
Unified Superscalar Shader Architecture
1600 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 320 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)
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 superior 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 superior 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 3.1 support ATI Avivo™ HD Video and Display Platform1
2nd generation Unified Video Decoder (UVD 2)
Enabling hardware decode acceleration of H.264, VC-1 and MPEG-2
Dual stream playback (or Picture-in-picture)
Hardware MPEG-1, and DivX video decode acceleration
Motion compensation and IDCT
ATI Avivo Video Post Processor1
New enhanced DVD up-conversion to HD
New automatic and dynamic contrast adjustment
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
Full score in HQV (SD) and HQV (HD) video quality benchmarks
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 DVI display outputs
Primary supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI) or 2560x1600 (dual-link DVI)2
Secondary supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI only)2
Each includes a dual-link HDCP encoder with on-chip key storage for high resolution playback of protected content4
Two integrated 400MHz 30-bit RAMDACs
Each supports analog displays connected by VGA at all resolutions up to 2048x15362
DisplayPort™ output support
Supports 24- and 30-bit displays at all resolutions up to 2560x16002
Integrated HD audio controller with up to 2 channel 48 kHz stereo or multi-channel (7.1) AC3 enabling a plug-and-play cable-less audio solution5
HDMI output support
Supports all display resolutions up to 1920x10802
Integrated HD audio controller with up to 2 channel 48 kHz stereo or multi-channel (7.1) AC3 enabling a plug-and-play cable-less audio solution5
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™ Technology4
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
Dual Mode ATI CrossFireX™ Multi-GPU Technology
Scale up rendering performance and image quality with up to four GPUs
Integrated compositing engine
High performance bridge interconnect
ATI Avivo™ HD is a technology platform that includes a broad set of capabilities offered by certain ATI Radeon™ HD GPUs. Not all products have all features and full enablement of some ATI Avivo™ HD capabilities may require complementary products.
Some custom resolutions require user configuration.
Playing HDCP content requires additional HDCP ready components, including but not limited to an HDCP ready monitor, Blu-ray or HD DVD disc drive, multimedia application and computer operating system.
ATI PowerPlay™ technology consists of numerous power saving features. Not all features may be available in all ATI Radeon HD 4800 Series graphics cards.
Subject to digital rights management limitations; maximum supported audio stream bandwidth is 6.144 Mbps.
ATI Radeon™ HD graphics chips have numerous features integrated into the processor itself (e.g., HDCP, HDMI, etc.). Third parties manufacturing products based on, or incorporating ATI Radeon HD graphics chips, may choose to enable some or all of these features. If a particular feature is important to you, please inquire of the manufacturer if a particular product supports this feature. In addition, some features or technologies may require you to purchase additional components in order to make full use of them (e.g. a Blu-Ray or HD-DVD drive, HDCP-ready monitor, etc.)
Proud ATi 4870X2 Owners
johnnyfiive|XFX|750MHz / 900MHz
95Viper|Sapphire|750MHz / 900MHz
human_error|Power Color|750MHz / 900MHz
Melvis|HIS|750MHz / 900MHz
DRDNA|ATi|750MHz / 900MHz (two!)
KieX|Powercolor|800MHz / 1000MHz
Blixx1981|ASUS Tri Fan|802Mhz / 1000Mhz
Marineborn|ASUS Tri Fan|820Mhz / 920Mhz
Yukikaze|Sapphire|800MHz / 925MHz
(FIH) The Don|ASUS|790MHz / 950MHz
1Kurgan1|Diamond|822MHz / 947MHz
JHine5588|Sapphire|750MHz / 900MHz
cookiemonster|XFX|750Mhz / 900Mhz
cdawall | Sapphire | 750MHz / 950MHz
If you would like to be added, simply tell me your username, card manufacture, and clocks ran 24/7 using the format below:
johnnyfiive|XFX|777MHz / 955MHz
Last edited:
drool when we saw one for sale in the store.
and thats still to much for me, so i had to go second hand Ebay style lol for under $400, with a receipt and warranty still.