GPU model | Polaris 20 | Lexa |
---|---|---|
GPU variant | Polaris 20 | Lexa PRO (215-0904018) |
Architecture | GCN 4.0 | GCN 4.0 |
Foundry | GlobalFoundries | GlobalFoundries |
Manufacturing process | 14 nm | 14 nm |
Number of transistors | 5,700 million | 2,200 million |
Die size | 232 mm² | 103 mm² |
Release date | Mar 18th, 2019 | Nov 11th, 2017 |
---|---|---|
Generation | Radeon Pro Mac (500X Series) | Mobility Radeon (RX M500) |
Production | Active | End-of-life |
Interface | PCIe 3.0 x16 | PCIe 3.0 x8 |
Predecessor | — | Crystal System |
Base clock | 1000 MHz | 1124 MHz |
---|---|---|
Boost clock | 1105 MHz | 1219 MHz |
Memory clock | 1700 MHz 6.8 Gbps effective | 1500 MHz 6 Gbps effective |
Memory size | 4 GB | 2 GB |
---|---|---|
Memory type | GDDR5 | GDDR5 |
Memory bus width | 256 bit | 128 bit |
Bandwidth | 217.6 GB/s | 96.00 GB/s |
Shading units | 1792 | 512 |
---|---|---|
TMUs | 112 | 32 |
ROPs | 32 | 16 |
Compute units | 28 | 8 |
Cache L1 | 16 KB (per CU) | 16 KB (per CU) |
Cache L2 | 2 MB | 512 KB |
Pixel rate | 35.36 GPixel/s | 19.50 GPixel/s |
---|---|---|
Texture rate | 123.8 GTexel/s | 39.01 GTexel/s |
FP16 (half) performance | 3.960 TFLOPS (1:1) | 1,248 GFLOPS (1:1) |
FP32 (float) performance | 3.960 TFLOPS | 1,248 GFLOPS |
FP64 (double) performance | 247.5 GFLOPS (1:16) | 78.02 GFLOPS (1:16) |
Slot width | IGP | IGP |
---|---|---|
TDP | 150 W | 50 W |
Outputs | No outputs | No outputs |
Power connectors | None | None |
DirectX | 12 (12_0) | 12 (12_0) |
---|---|---|
OpenGL | 4.6 | 4.6 |
OpenCL | 2.1 | 2.1 |
Vulkan | 1.2 | 1.2 |
Shader model | 6.4 | 6.4 |