处理器
| 处理器频率 |
750 MHz |
| 图形适配器随机存取存储器数字/模拟转换器 |
400 MHz |
| 最大模拟分辨率 |
2048 x 1536 pixels |
| 最大数字分辨率 |
2560 x 1600 pixels |
内存参数
| 图形适配器内存类型 |
GDDR5 |
| 内存带宽（最大） |
3.6 GB/s |
| 数据宽度 |
512 bit |
| 内存时钟速度 |
900 MHz |
| 独立显卡适配器內存 |
2 GB |
性能
| DirectX版本 |
10.1 |
| OpenGL版本 |
2.0 |
| 双头数字显示扩展卡 |
Y |
| 最高着色模型版本 |
4.1 |
| HDCP |
Y |
端口 & 界面
| 接口类型 |
PCI Express 2.0 |
| DVI-I接口数量 |
2 |
| HDMI端口数量 |
1 |
Radeon HD4870X2, 2GB GDDR5, 750MHz, 3.6Gbps, 256bit, DirectX 10.1, PCIE 2.0, DVI, HDMI
- 1.912 billion processors (956 million transistors per GPU on 55nm fabrication process)
- PCI Express 2.0 x16 bus interface
- 256-bit + 256 bit GDDR5 memory interface
- MicrosoftR DirectXR 10.1 support
- ShaderModel 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
- 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, 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
- Accelerated physics processing
- Dynamic Geometry Acceleration
- High performance vertex cache
- Programmable tessellation unit
- Accelerated geometry shaderpath 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 renderin
- 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 2.0 support
- ATI Avivo HD Video and Display Platform
- 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 DivXvideo decode acceleration
- Motion compensation and IDCT
- ATI AvivoVideo Post Processor1
- New enhanced DVD up-conversion to HD
- New automatic and dynamic contrast adjustment
- Color space conversion
- Chromasubsamplingformat 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)
- Secondary supports 18-, 24-, and 30-bit digital displays at all resolutions up to 1920x1200 (single-link DVI only)
- Each includes a dual-link HDCP encoder with on-chip key storage for high resolution playback of protected content
- Two integrated 400MHz 30-bit RAMDACs
- Each supports analog displays connected by VGA at all resolutions up to 2048x1536
- HDMI output support
- Supports all display resolutions up to 1920x1080
- 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 solution
- Integrated AMD Xilleon HDTV encoder
- Provides high quality analog TV output (component/S-video/composite)
- Supports SDTV and HDTV resolutions
- Underscanand overscancompensation
- MPEG-2, MPEG-4, DivX, WMV9, VC-1, and H.264/AVC encoding and transcoding
- Seamless integration of pixel shaderswith video in real time
- VGA mode support on all display outputs
- ATI PowerPlay Technology
- 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 fourGPUs
- Integrated compositing engine
- High performance bridge interconnect
