Mobility Radeon HD 4870 X2
| Manufacturer: | ATI |
| Series: | Mobility HD 4xxx |
| Codename: | M98 XT |
| Release date: | 2009. January 09. |
| 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: | 550 MHz |
| Memory clock: | 700 MHz |
| Effective memory clock (DDR): | 5600 MHz |
Memory
| Memory size: | 2x 1024 MB |
| Memory bus type: | GDDR5 |
| Memory bus width: | 2x 256 bit |
| Memory bandwidth (maximum): | 2x 89.6 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 |
Performance
| Pixel fillrate: | 2x 8.8 (GP/s) |
| Texture fillrate: | 2x 22 (GT/s) |
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