AMD Radeon 550X Mobile vs AMD Radeon HD 6970M Mac Edition
Graphics Processor
| GPU model | Polaris 23 | Blackcomb |
|---|---|---|
| GPU variant | Polaris 23 MXT | Blackcomb XT (216-0811000) |
| Architecture | GCN 4.0 | TeraScale 2 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 40 nm |
| Number of transistors | 2,200 million | 1,700 million |
| Die size | 103 mm² | 212 mm² |
Mobile graphics
| Release date | Apr 11th, 2018 | Aug 25th, 2011 |
|---|---|---|
| Generation | Mobility Radeon (M500X) | Vancouver (HD 6900M) |
| Production | Active | End-of-life |
| Interface | PCIe 3.0 x8 | MXM-B (3.0) |
| Predecessor | Crystal System | Manhattan |
| Successor | — | London |
Clocks
| Base clock | 1100 MHz | — |
|---|---|---|
| Boost clock | 1287 MHz | — |
| Memory clock | 1500 MHz 6 Gbps effective | 900 MHz 3.6 Gbps effective |
| GPU clock | — | 680 MHz |
Memory Configuration
| Memory size | 4 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 48.00 GB/s | 115.2 GB/s |
Render Configuration
| Shading units | 640 | 960 |
|---|---|---|
| TMUs | 40 | 48 |
| ROPs | 16 | 32 |
| Compute units | 10 | 12 |
| Cache L1 | 16 KB (per CU) | 8 KB (per CU) |
| Cache L2 | 256 KB | 512 KB |
Performance
| Pixel rate | 20.59 GPixel/s | 21.76 GPixel/s |
|---|---|---|
| Texture rate | 51.48 GTexel/s | 32.64 GTexel/s |
| FP16 (half) performance | 1.647 TFLOPS (1:1) | — |
| FP32 (float) performance | 1.647 TFLOPS | 1,306 GFLOPS |
| FP64 (double) performance | 103.0 GFLOPS (1:16) | — |
Dimensions & Outputs
| Slot width | IGP | MXM Module |
|---|---|---|
| TDP | 50 W | 75 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | None |
| Board number | — | C296 |
API Support & Features
| DirectX | 12 (12_0) | 11.2 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.4 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2 | — |
| Shader model | 6.4 | 5.0 |
