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 |
| 图形处理器系列 |
AMD |
| 流处理器 |
640 |
内存参数
| 图形适配器内存类型 |
GDDR5 |
| 数据宽度 |
128 bit |
| 内存时钟速度 |
800 MHz |
性能
| DirectX版本 |
10.1 |
| OpenGL版本 |
3.0 |
| 最高着色模型版本 |
4.1 |
| HDCP |
Y |
端口 & 界面
| TV输出 |
Y |
| 接口类型 |
PCI Express 2.0 |
| DVI-I接口数量 |
2 |
| VGA（D-SUB）端口数量 |
1 |
Radeon HD4770 512MB, GDDR5, PCI-E, 750MHz, DirectX 10.1
826 million transistors on 40nm fabrication process
PCI ExpressR 2.0 x16 bus interface
128-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
- 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, 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)
- Adaptive super-sampling and multi-sampling
- Gamma correct
- Super AA (ATI CrossFireXTM 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 3.0 support
ATI AvivoTM HD Video and Display Platform
