Radeon Pro 555X (Polaris 21)
AMD
Catalog context
Within its series, the Radeon Pro 555X (Polaris 21) ranks 24th of 27 for FP32 throughput and 38th of 68 for memory capacity. Its 50 W TDP is within the 75 W PCIe slot-power ceiling. The source does not record generation, codename, transistors and sm count, or 5 further fields, for this variant.
| Launch date | July 16, 2018 |
|---|---|
| Series | Radeon Pro |
| Generation | — |
| Codename | — |
| Form factor | mobile |
| Architecture | GCN 4 |
| Process | 14 nm |
| Transistors | — |
| Die size | 123 mm² |
| Shaders | 768 |
| TMUs | 48 |
| ROPs | 16 |
| SM count | — |
| Base clock | — |
| Boost clock | — |
| Memory clock | — |
| Memory | 4 GB |
| Memory type | GDDR5 |
| Bus width | 128 bit |
| Bandwidth | 94.08 GB/s |
| Pixel fill rate | 14.51 GP/s |
| Texture fill rate | 43.54 GT/s |
| FP32 | 1,393 GFLOPS |
| FP64 | 87.07 GFLOPS |
| TDP | 50 W |
| Bus interface | PCIe 3.0 ×16 |
| External power required | — |
| Launch MSRP | — |
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Source: Wikipedia, revision 1364362273 · catalog loaded 2026-08-16