AMD Radeon HD 7550M vs AMD Radeon HD 8670M
Graphics Processor
| GPU model | Thames | Mars |
|---|---|---|
| GPU variant | Thames LP | Mars XT |
| Architecture | TeraScale 2 | GCN 1.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 40 nm | 28 nm |
| Number of transistors | 716 million | 950 million |
| Die size | 104 mm² | 77 mm² |
Mobile graphics
| Release date | Jan 7th, 2012 | Mar 1st, 2013 |
|---|---|---|
| Generation | London (HD 7500M) | Solar System (HD 8600M) |
| Production | End-of-life | End-of-life |
| Interface | PCIe 2.0 x16 | PCIe 3.0 x8 |
| Predecessor | Vancouver | London |
| Successor | Solar System | Crystal System |
Clocks
| Base clock | 450 MHz | 775 MHz |
|---|---|---|
| Boost clock | 550 MHz | 825 MHz |
| Memory clock | 900 MHz 1800 Mbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | DDR3 |
| Memory bus width | 64 bit | 64 bit |
| Bandwidth | 14.40 GB/s | 14.40 GB/s |
Render Configuration
| Shading units | 400 | 384 |
|---|---|---|
| TMUs | 20 | 24 |
| ROPs | 8 | 8 |
| Compute units | 5 | 6 |
| Cache L1 | — | 16 KB (per CU) |
| Cache L2 | — | 128 KB |
Performance
| Pixel rate | 4.400 GPixel/s | 6.600 GPixel/s |
|---|---|---|
| Texture rate | 11.00 GTexel/s | 19.80 GTexel/s |
| FP32 (float) performance | 440.0 GFLOPS | 633.6 GFLOPS |
Dimensions & Outputs
| TDP | 14 W | unknown |
|---|---|---|
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 11.2 (11_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.4 | 4.6 |
| OpenCL | 1.2 | 1.2 |
| Vulkan | — | 1.2 |
| Shader model | 5.0 | 5.1 |
