AMD Radeon R7 M270 vs NVIDIA GeForce GTX 850A
Graphics Processor
| GPU model | Opal | GM107 |
|---|---|---|
| GPU variant | Opal XT | N15P-GT-A1 |
| Architecture | GCN 1.0 | Maxwell |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 950 million | 1,870 million |
| Die size | 77 mm² | 148 mm² |
Mobile graphics
| Release date | Jan 9th, 2014 | Mar 17th, 2014 |
|---|---|---|
| Generation | Crystal System (R7 M200) | GeForce 800A |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Predecessor | Solar System | GeForce 700A |
| Successor | Mobility Radeon | GeForce 900A |
Clocks
| Base clock | 725 MHz | 902 MHz |
|---|---|---|
| Boost clock | 825 MHz | 936 MHz |
| Memory clock | 900 MHz 1800 Mbps effective | 900 MHz 1800 Mbps effective |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | DDR3 | DDR3 |
| Memory bus width | 128 bit | 128 bit |
| Bandwidth | 28.80 GB/s | 28.80 GB/s |
Render Configuration
| Shading units | 384 | 640 |
|---|---|---|
| TMUs | 24 | 40 |
| ROPs | 8 | 16 |
| Compute units | 6 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SMM) |
| Cache L2 | 256 KB | 2 MB |
| SMM count | — | 5 |
Performance
| Pixel rate | 6.600 GPixel/s | 14.98 GPixel/s |
|---|---|---|
| Texture rate | 19.80 GTexel/s | 37.44 GTexel/s |
| FP32 (float) performance | 633.6 GFLOPS | 1,198 GFLOPS |
| FP64 (double) performance | — | 37.44 GFLOPS (1:32) |
Dimensions & Outputs
| TDP | unknown | 45 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | IGP |
API Support & Features
| DirectX | 12 (11_1) | 12 (11_0) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 1.2 | 3.0 |
| Vulkan | 1.2 | 1.1 |
| Shader model | 5.1 | 5.1 |
| CUDA | — | 5.0 |
