AMD Radeon 540 Mobile vs AMD Radeon HD 7850M
Graphics Processor
| GPU model | Lexa | Heathrow |
|---|---|---|
| GPU variant | Lexa PRO (215-0904018) | Heathrow PRO |
| Architecture | GCN 4.0 | GCN 1.0 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 28 nm |
| Number of transistors | 2,200 million | 1,500 million |
| Die size | 103 mm² | 123 mm² |
Mobile graphics
| Release date | Mar 26th, 2019 | Apr 24th, 2012 |
|---|---|---|
| Generation | Mobility Radeon (M500) | London (HD 7800M) |
| Production | End-of-life | End-of-life |
| Interface | PCIe 3.0 x8 | PCIe 3.0 x16 |
| Predecessor | Crystal System | Vancouver |
| Successor | — | Solar System |
Clocks
| Base clock | 1100 MHz | — |
|---|---|---|
| Boost clock | 1124 MHz | — |
| Memory clock | 1500 MHz 6 Gbps effective | 1000 MHz 4 Gbps effective |
| GPU clock | — | 675 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 128 bit |
| Bandwidth | 48.00 GB/s | 64.00 GB/s |
Render Configuration
| Shading units | 512 | 640 |
|---|---|---|
| TMUs | 32 | 40 |
| ROPs | 16 | 16 |
| Compute units | 8 | 10 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 256 KB | 256 KB |
Performance
| Pixel rate | 17.98 GPixel/s | 10.80 GPixel/s |
|---|---|---|
| Texture rate | 35.97 GTexel/s | 27.00 GTexel/s |
| FP16 (half) performance | 1,151 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,151 GFLOPS | 864.0 GFLOPS |
| FP64 (double) performance | 71.94 GFLOPS (1:16) | 54.00 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | Dual-slot | — |
|---|---|---|
| TDP | 50 W | 40 W |
| Outputs | No outputs | No outputs |
| Power connectors | None | — |
API Support & Features
| DirectX | 12 (12_0) | 12 (11_1) |
|---|---|---|
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.1 | 1.2 |
| Vulkan | 1.2 | 1.2 |
| Shader model | 6.4 | 5.1 |
