AMD · GCN 4 · 2018
Radeon Pro 555X (Polaris 21)
Radeon Pro 555X (Polaris 21): 4 GB GDDR5, 50 W, 768 Stream processors. Launched July 16, 2018.
- Memory
- 4 GB
- Power
- 50 W
- Bus width
- 128 bit
Memory4 GB
38 of 69 in Radeon Pro
Power50 W
50 of 73 by higher draw in Radeon Pro
Stream processors768
41 of 52 in Radeon Pro
Current market
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Specifications
Memory
- Capacity
- 4 GB
- Memory type
- GDDR5
- Bus width
- 128 bit
- Bandwidth
- 94.08 GB/s
Compute
- Stream processors
- 768
- TMUs
- 48
- ROPs
- 16
- FP32
- 1,393 GFLOPS
- FP64
- 87.07 GFLOPS
- Pixel fill rate
- 14.51 GP/s
- Texture fill rate
- 43.54 GT/s
Board
- TDP
- 50 W
- Bus interface
- PCIe 3.0 ×16
- Form factor
- mobile
Physical
- Architecture
- GCN 4
- Process
- 14 nm
- Die size
- 123 mm²
- Series
- Radeon Pro
- Launch date
- July 16, 2018
Not recorded by the source: generation, codename, transistors and sm count, or 5 further fields.
Die figure
Silicon, made visible
Die area is drawn against the largest recorded die in the catalog. Shader dots use a labeled, card-specific ratio so both early and modern GPUs remain legible.
Catalog context
Within its series, the Radeon Pro 555X (Polaris 21) ranks 24th of 27 for FP32 throughput and 38th of 69 for memory capacity. Its 50 W TDP is within the 75 W PCIe slot-power ceiling.
Source: Wikipedia, revision 1364362273 · catalog loaded 2026-08-16