AMD Lexa

Lexa

Lexa MCM Pro

Lexa PRO

Lexa XT

AMD's Lexa GPU uses the GCN 4.0 architecture and is made using a 14 nm production process at GlobalFoundries. With a die size of 103 mm² and a transistor count of 2,200 million it is a small chip. Lexa supports DirectX 12 (Feature Level 12_0). For GPU compute applications, OpenCL version 2.1 can be used. It features 640 shading units, 40 texture mapping units and 16 ROPs.

Further reading: Polaris Architecture Whitepaper

Graphics Processor

Released: Apr 20th, 2017

GPU Name: Lexa

Codename: Polaris 12

Generation: Arctic Islands

Architecture: GCN 4.0

Foundry: GlobalFoundries

Process Size: 14 nm

Transistors: 2,200 million

Density: 21.4M / mm²

Die Size: 103 mm²

Package: FCBGA-769

Graphics Features

DirectX: 12 (12_0)

OpenGL: 4.6

OpenCL: 2.1

Vulkan: 1.3

Shader Model: 6.7

WDDM: 3.1

Compute: GFX8 (gfx804)

DCE: 11.2

UVD: 6.3

VCE: 3.4

SDMA: 3.0.0

CLRX: GCN 1.2.0

Render Config

Shading Units: 640

TMUs: 40

ROPs: 16

Compute Units: 10

ACEs: 4

HWSs: 2

SEs: 2

L1 Cache: 16 KB per CU

L2 Cache: 512 KB

Max. TDP: 65 W

All GCN 4.0 GPUs

AMD GPU Architecture History

2023 CDNA 3.0
2022-2024 RDNA 3.0
2021 CDNA 2.0
2020 CDNA 1.0
2020-2023 RDNA 2.0
2019-2020 RDNA 1.0
2018-2022 GCN 5.1
2017-2020 GCN 5.0
2016-2020 GCN 4.0
2014-2019 GCN 3.0
2013-2017 GCN 2.0
2011-2020 GCN 1.0
2010-2013 TeraScale 3
2009-2015 TeraScale 2
2005-2013 TeraScale
2005-2007 Ultra-Threaded SE

Graphics cards using the AMD Lexa GPU

Name	Chip	Memory	Shaders	TMUs	ROPs	Base Clock	Boost Clock	Memory Clock
AMD Radeon RX 550	Lexa PRO	2 GB	512	32	16	1100 MHz	1183 MHz	1750 MHz
AMD Radeon Pro WX 3100	Lexa XT	4 GB	512	32	16	925 MHz	1219 MHz	1500 MHz
AMD Radeon Pro WX 2100	Lexa PRO GL	2 GB	512	32	16	925 MHz	1219 MHz	1500 MHz
AMD Radeon E9171 MCM	Lexa MCM Pro	4 GB	512	32	16	1124 MHz	1219 MHz	1500 MHz
AMD Radeon E9172 MXM	E9170	2 GB	512	32	16	1124 MHz	1219 MHz	1500 MHz
AMD Radeon E9174 MXM	E9170	4 GB	512	32	16	1124 MHz	1219 MHz	1500 MHz
AMD Radeon E9173 PCIe	E9170	2 GB	512	32	16	1124 MHz	1219 MHz	1500 MHz
AMD Radeon E9175 PCIe	E9170	4 GB	512	32	16	1124 MHz	1219 MHz	1500 MHz
AMD Radeon RX 540 Mobile	Lexa PRO	2 GB	512	32	16	1046 MHz		1250 MHz
AMD Radeon RX 550 Mobile	Lexa PRO	2 GB	640	40	16	1100 MHz	1287 MHz	1500 MHz
AMD Radeon RX 550X	Lexa PRO	4 GB	512	32	16	1100 MHz	1183 MHz	1500 MHz
AMD Radeon 550X 640SP	Lexa PRO	4 GB	640	40	16	1019 MHz	1071 MHz	1500 MHz
AMD Radeon 550	Lexa PRO	2 GB	512	32	16	1100 MHz	1183 MHz	1750 MHz
AMD Radeon 540X Mobile	Lexa PRO	2 GB	512	32	16	980 MHz	1046 MHz	1500 MHz
AMD Radeon 540 Mobile	Lexa PRO	2 GB	512	32	16	1046 MHz		1300 MHz
AMD Radeon 550X	Lexa PRO	2 GB	512	32	16	1082 MHz	1218 MHz	1750 MHz

Lexa GPU Notes

Generation: Arctic Islands
Codename: Polaris 12
Old Codename: Treasure
Graphics/Compute: GFX8 (gfx804)
Display Core Engine: 11.2
Unified Video Decoder: 6.3
Video Compression Engine: 3.4
System DMA: 3.0.0
CLRX: GCN 1.2.0

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