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AMD Polaris 21

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Polaris 21
Polaris 21 XT
Polaris 21 XT
Die Shot
Fritzchens Fritz
Die Shot
Block Diagram
Block Diagram
AMD's Polaris 21 GPU uses the GCN 4.0 architecture and is made using a 14 nm production process at GlobalFoundries. With a die size of 123 mm² and a transistor count of 3,000 million it is a small chip. Polaris 21 supports DirectX 12 (Feature Level 12_0). It features 1024 shading units, 64 texture mapping units and 16 ROPs.
Further reading: Polaris Architecture Whitepaper

Graphics Processor

GPU Name
Polaris 21
Architecture
GCN 4.0
Foundry
GlobalFoundries
Process Size
14 nm
Transistors
3,000 million
Density
24.4M / mm²
Die Size
123 mm²
Released
Apr 18th, 2017

Graphics Features

DirectX
12 (12_0)
OpenGL
4.6
OpenCL
2.0
Vulkan
1.2.131
Shader Model
6.4
Compute
GFX8
ROCm
Yes

Render Config

Shading Units
1024
TMUs
64
ROPs
16
Compute Units
16
ACEs
4
HWSs
2
SEs
2
L1 Cache
16 KB per CU
L2 Cache
1024 KB
Max. TDP
75 W

All GCN 4.0 GPUs

AMD GPU Architecture History

Graphics cards using the AMD Polaris 21 GPU

Name Chip Memory Shaders TMUs ROPs Base Clock Boost Clock Memory Clock
AMD Radeon RX 560 Polaris 21 XT 4 GB 1024 64 16 1175 MHz 1275 MHz 1750 MHz
AMD Radeon Pro 560 Polaris 21 XT 4 GB 1024 64 16 907 MHz 1270 MHz
AMD Radeon Pro 555 Polaris 21 PRO 2 GB 768 48 16 850 MHz 1275 MHz
AMD Radeon RX 560D Polaris 21 XL 4 GB 896 56 16 1090 MHz 1175 MHz 1500 MHz
AMD Radeon RX 560 896SP Polaris 21 XL 4 GB 896 56 16 1090 MHz 1175 MHz 1750 MHz
AMD Radeon RX 560X Polaris 21 XT 4 GB 1024 64 16 1175 MHz 1275 MHz 1750 MHz
AMD Radeon RX 560X Mobile Polaris 21M XT 2 GB 1024 64 16 1175 MHz 1202 MHz 1500 MHz
AMD Radeon RX 560DX Polaris 21 XL 4 GB 896 56 16 1090 MHz 1175 MHz 1500 MHz
AMD Radeon Pro 560X Polaris 21 XT 4 GB 1024 64 16 1004 MHz 1270 MHz
AMD Radeon Pro 555X Polaris 21 PRO 4 GB 768 48 16 907 MHz 1275 MHz

Polaris 21 GPU Notes

Architecture Codename: Arctic Islands
Codename: Baffin
CLRX Version: GCN 1.2
Graphics/Compute: GFX8 (gfx803)
Display Core Engine: 11.2
Unified Video Decoder: 6.3
Video Compression Engine: 3.4