AMD Radeon HD 8670M vs NVIDIA GeForce GT 425M
Graphics Processor
| GPU model | Mars | GF108 |
|---|---|---|
| GPU variant | Mars XT | N11P-GS-A1 |
| Architecture | GCN 1.0 | Fermi |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 40 nm |
| Number of transistors | 950 million | 585 million |
| Die size | 77 mm² | 116 mm² |
Mobile graphics
| Release date | Mar 1st, 2013 | Sep 3rd, 2010 |
|---|---|---|
| Generation | Solar System (HD 8600M) | GeForce 400M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | PCIe 2.0 x16 |
| Predecessor | London | GeForce 300M |
| Successor | Crystal System | GeForce 500M |
Clocks
| Base clock | 775 MHz | — |
|---|---|---|
| Boost clock | 825 MHz | — |
| Memory clock | 900 MHz 1800 Mbps effective | 800 MHz 1600 Mbps effective |
| GPU clock | — | 560 MHz |
| Shader clock | — | 1120 MHz |
Memory Configuration
| Memory size | 1024 MB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | DDR3 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 14.40 GB/s | 25.60 GB/s |
Render Configuration
| Shading units | 384 | 96 |
|---|---|---|
| TMUs | 24 | 16 |
| ROPs | 8 | 4 |
| Compute units | 6 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SM) |
| Cache L2 | 128 KB | 256 KB |
| SM count | — | 2 |
Performance
| Pixel rate | 6.600 GPixel/s | 2.240 GPixel/s |
|---|---|---|
| Texture rate | 19.80 GTexel/s | 8.960 GTexel/s |
| FP32 (float) performance | 633.6 GFLOPS | 215.0 GFLOPS |
| FP64 (double) performance | — | 17.92 GFLOPS (1:12) |
Dimensions & Outputs
| TDP | unknown | 23 W |
|---|---|---|
| Outputs | No outputs | No outputs |
API Support & Features
| DirectX | 12 (11_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 1.1 |
| Vulkan | 1.2 | — |
| Shader model | 5.1 | 5.1 |
| CUDA | — | 2.1 |
