Radeon HD 4870 X2
| Manufacturer: | AMD |
| Series: | HD 4xxx (Radeon R700) |
| Codename: | R700 |
| Release date: | 2008. August 12. |
| Die count: | 2 |
| Die size: | 2x 256 mm2 |
| Fab: | 55 nm |
| Transistors: | 2x 956 millions |
| Bus interface: | PCI-E 2.0 x16 |
Clock rates
| Core clock: | 700 MHz |
| Memory clock: | 900 MHz |
| Effective memory clock (DDR): | 7200 MHz |
Memory
| Memory size: | 2x 1024 MB |
| Memory bus type: | GDDR5 |
| Memory bus width: | 2x 256 bit |
| Memory bandwidth (maximum): | 2x 115 GB/s |
Core units
| Unified shader units: | 2x 800 |
| Texture mapping units (TMU): | 2x 40 |
| Render output units (ROP): | 2x 16 |
| Compute units: | 2x 10 |
Supported Technologies:
| DirectX: | 10.1 |
| OpenGL: | 3.3 |
| OpenCL: | 1.0 |
Performance
| Pixel fillrate: | 2x 11.2 (GP/s) |
| Texture fillrate: | 2x 28 (GT/s) |
| Thermal Design Power (TDP,Max): | 286 W |
| Release price (USD): | 550 USD |
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