Radeon HD 3870
| Manufacturer: | AMD |
| Series: | HD 3xxx (Radeon R600) |
| Codename: | RV670 XT |
| Architecture: | TeraScale 1 |
| Release date: | 2007. November 19. |
| Die count: | 1 |
| Die size: | 192 mm2 |
| Fab: | 55 nm |
| Transistors: | 666 millions |
| Bus interface: | PCI-E 2.0 x16, AGP 8x |
Clock rates
| Core clock: | 777 MHz |
| Memory clock: | 1126 MHz |
| Effective memory clock (DDR): | 9008 MHz |
Memory
| Memory size: | 1024, 512 MB |
| Memory bus type: | GDDR4 |
| Memory bus width: | 256 bit |
| Memory bandwidth (maximum): | 72.1 GB/s |
Core units
| Unified shader units: | 320 |
| Texture mapping units (TMU): | 16 |
| Render output units (ROP): | 16 |
| Compute units: | 4 |
Supported Technologies:
| DirectX: | 10.1 |
| OpenGL: | 3.3 |
| OpenCL: | 1.0 |
Performance
| Pixel fillrate: | 12.4 (GP/s) |
| Texture fillrate: | 12.4 (GT/s) |
| Thermal Design Power (TDP,Max): | 106 W |
| Release price (USD): | 270 USD |
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