AMD Radeon HD 7870M vs NVIDIA GeForce 940MX
Graphics Processor
| GPU model | Heathrow | GM107 |
|---|---|---|
| GPU variant | Heathrow XT (216-0835033) | N16S-GT1R |
| Architecture | GCN 1.0 | Maxwell |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 28 nm |
| Number of transistors | 1,500 million | 1,870 million |
| Die size | 123 mm² | 148 mm² |
Mobile graphics
| Release date | Apr 24th, 2012 | Jun 28th, 2016 |
|---|---|---|
| Generation | London (HD 7800M) | GeForce 900M |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x16 | PCIe 3.0 x8 |
| Predecessor | Vancouver | GeForce 800M |
| Successor | Solar System | GeForce 10 Mobile |
Clocks
| GPU clock | 800 MHz | — |
|---|---|---|
| Memory clock | 1000 MHz 4 Gbps effective | 1253 MHz 5 Gbps effective |
| Base clock | — | 795 MHz |
| Boost clock | — | 861 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 128 bit | 64 bit |
| Bandwidth | 64.00 GB/s | 40.10 GB/s |
Render Configuration
| Shading units | 640 | 512 |
|---|---|---|
| TMUs | 40 | 32 |
| ROPs | 16 | 8 |
| Compute units | 10 | — |
| Cache L1 | 16 KB (per CU) | 64 KB (per SMM) |
| Cache L2 | 256 KB | 1024 KB |
| SMM count | — | 4 |
Performance
| Pixel rate | 12.80 GPixel/s | 6.888 GPixel/s |
|---|---|---|
| Texture rate | 32.00 GTexel/s | 27.55 GTexel/s |
| FP32 (float) performance | 1,024 GFLOPS | 881.7 GFLOPS |
| FP64 (double) performance | 64.00 GFLOPS (1:16) | 27.55 GFLOPS (1:32) |
Dimensions & Outputs
| TDP | 45 W | 23 W |
|---|---|---|
| Outputs | No outputs | No outputs |
| Slot width | — | MXM Module |
| Power connectors | — | None |
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 |
