The AMD Radeon HD 7970M Crossfire (sometimes referred to as the ATI Mobility Radeon HD 7970X2) is a combination of two high-end graphics cards for use in large laptops. Typically, each card processes a single frame. At this percentage, micro-flickering may occur around 30 fps. This is because the timing between frames can be different.
The HD 7970M has 1280 1D shaders and 80 texture units; It is based on the desktop HD 7870 Pitcairn chip. The GCN architecture supports DirectX11 and OpenGL 4.2.
The performance of the two cards in Crossfire mode is clearly better than the GeForce GTX 580M SLI, aka the 675M SLI, and on par with the GeForce GTX 680M SLI. Performance-demanding games such as Battlefield 3 can thus be played fluently at high resolutions and details.
The power consumption of the combination is quite high at 2x 100 Watts, so it is only used in very large laptops.
| Radeon HD 7900M Series | Radeon HD 7970M Crossfire2560 @ 0.85 GHz2x 256 Bit @ 4800 MHzRadeon HD 7970M1280 @ 0.85 GHz256 Bit @ 4800 MHzRadeon HD 7950M1280 @ 0.7 GHz256 Bit @ 4000 MHz |
| Code name | Wimbledon XT |
| Architectural | GCN |
| Pipelines | 1280 – unified |
| Core Speed | 850 MHz |
| Memory Speed | 4800 MHz |
| Memory Bus width | 256 Bit |
| Memory type | GDDR5 |
| Shared memory | NO |
| API | DirectX 11.1, Shader 5.0, OpenGL 4.2 |
| Instant consumption | 100 Watt |
| technology | 28 nm |
| Notebook Size | wide |
| Announcement Date | 01.05.2012 |
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