AMD Radeon 540X Mobile vs AMD Radeon HD 8870 OEM
Graphics Processor
| GPU model | Lexa | Pitcairn |
|---|---|---|
| GPU variant | Lexa PRO (215-0904018) | Pitcairn XT (215-0828047) |
| Architecture | GCN 4.0 | GCN 1.0 |
| Foundry | GlobalFoundries | TSMC |
| Manufacturing process | 14 nm | 28 nm |
| Number of transistors | 2,200 million | 2,800 million |
| Die size | 103 mm² | 212 mm² |
Mobile graphics
| Release date | Feb 11th, 2019 | — |
|---|---|---|
| Generation | Mobility Radeon (M500X) | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | Crystal System | — |
Clocks
| Base clock | 980 MHz | — |
|---|---|---|
| Boost clock | 1095 MHz | — |
| Memory clock | 1000 MHz 4 Gbps effective | 1200 MHz 4.8 Gbps effective |
| GPU clock | — | 1000 MHz |
Memory Configuration
| Memory size | 2 GB | 2 GB |
|---|---|---|
| Memory type | GDDR5 | GDDR5 |
| Memory bus width | 64 bit | 256 bit |
| Bandwidth | 32.00 GB/s | 153.6 GB/s |
Render Configuration
| Shading units | 512 | 1280 |
|---|---|---|
| TMUs | 32 | 80 |
| ROPs | 16 | 32 |
| Compute units | 8 | 20 |
| Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
| Cache L2 | 512 KB | 512 KB |
Performance
| Pixel rate | 17.52 GPixel/s | 32.00 GPixel/s |
|---|---|---|
| Texture rate | 35.04 GTexel/s | 80.00 GTexel/s |
| FP16 (half) performance | 1,121 GFLOPS (1:1) | — |
| FP32 (float) performance | 1,121 GFLOPS | 2.560 TFLOPS |
| FP64 (double) performance | 70.08 GFLOPS (1:16) | 160.0 GFLOPS (1:16) |
Dimensions & Outputs
| Slot width | Dual-slot | Dual-slot |
|---|---|---|
| TDP | 50 W | 175 W |
| Outputs | No outputs | 1x DVI1x HDMI2x mini-DisplayPort |
| Power connectors | None | 2x 6-pin |
| Length | — | 241 mm 9.5 inches |
| Suggested PSU | — | 450 W |
| Board number | — | C401 |
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 |
Other Features
Graphics Card
| Release date | — | Jan 8th, 2013 |
|---|---|---|
| Generation | — | Sea Islands |
| Production | — | End-of-life |
| Interface | — | PCIe 3.0 x16 |
| Predecessor | — | Southern Islands |
| Successor | — | Volcanic Islands |
