AMD Radeon HD 6970M Mac Edition vs AMD Radeon R9 M470
Graphics Processor
| GPU model | Blackcomb | Emerald |
|---|---|---|
| GPU variant | Blackcomb XT (216-0811000) | Emerald PRO |
| Architecture | TeraScale 2 | GCN 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 1,700 million | 2,080 million |
| Die size | 212 mm² | 160 mm² |
Mobile graphics
| Release date | Aug 25th, 2011 | May 15th, 2016 |
|---|---|---|
| Generation | Vancouver (HD 6900M) | Crystal System (R9 M400) |
| Production | End-of-life | End-of-life |
| Interface | MXM-B (3.0) | PCIe 3.0 x16 |
| Predecessor | Manhattan | Solar System |
| Successor | London | Mobility Radeon |
Clocks
| GPU clock | 680 MHz | — |
|---|---|---|
| Memory clock | 900 MHz 3.6 Gbps effective | 1500 MHz 6 Gbps effective |
| Base clock | — | 900 MHz |
| Boost clock | — | 1000 MHz |
Memory Configuration
| Memory size | 2 GB | 4 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 256 bit | 128 bit |
| Bandwidth | 115.2 GB/s | 96.00 GB/s |
Render Configuration
| Shading units | 960 | 768 |
|---|---|---|
| TMUs | 48 | 48 |
| ROPs | 32 | 16 |
| Compute units | 12 | 12 |
| Cache L1 | 8 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 256 KB |
Performance
| Pixel rate | 21.76 GPixel/s | 16.00 GPixel/s |
|---|---|---|
| Texture rate | 32.64 GTexel/s | 48.00 GTexel/s |
| FP32 (float) performance | 1,306 GFLOPS | 1.536 TFLOPS |
| FP64 (double) performance | — | 96.00 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | MXM Module | — |
|---|---|---|
| TDP | 75 W | unknown |
| Outputs | No outputs | No outputs |
| Power connectors | None | — |
| Board number | C296 | — |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (12_0) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 2.0 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 6.3 |
