AMD Radeon HD 7970M vs AMD Radeon R9 M485X
Graphics Processor
| GPU model | Wimbledon | Amethyst |
|---|---|---|
| GPU variant | Wimbledon XT (216-0836036) | Amethyst XT |
| Architecture | GCN 1.0 | GCN 3.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 2,800 million | 5,000 million |
| Die size | 212 mm² | 366 mm² |
Mobile graphics
| Release date | Apr 24th, 2012 | May 15th, 2016 |
|---|---|---|
| Generation | London (HD 7900M) | Crystal System (R9 M400) |
| Production | End-of-life | End-of-life |
| Interface | MXM-B (3.0) | MXM-B (3.0) |
| Predecessor | Vancouver | Solar System |
| Successor | Solar System | Mobility Radeon |
Clocks
| GPU clock | 850 MHz | 723 MHz |
|---|---|---|
| Memory clock | 1200 MHz 4.8 Gbps effective | 1250 MHz 5 Gbps effective |
Memory Configuration
| Memory size | 2 GB | 8 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 256 bit |
| Bandwidth | 153.6 GB/s | 160.0 GB/s |
Render Configuration
| Shading units | 1280 | 2048 |
|---|---|---|
| TMUs | 80 | 128 |
| ROPs | 32 | 32 |
| Compute units | 20 | 32 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 27.20 GPixel/s | 23.14 GPixel/s |
|---|---|---|
| Texture rate | 68.00 GTexel/s | 92.54 GTexel/s |
| FP32 (float) performance | 2.176 TFLOPS | 2.961 TFLOPS |
| FP64 (double) performance | 136.0 GFLOPS (1:16) | 185.1 GFLOPS (1:16) |
| FP16 (half) performance | — | 2.961 TFLOPS (1:1) |
Dimensions & Outputs
| Slot width | MXM Module | MXM Module |
|---|---|---|
| TDP | 100 W | 250 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | None |
| Board number | C429 | — |
API Support & Features
| DirectX | 12 (11_1) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 5.1 | 6.3 |
