AMD Seymour

Seymour

Seymour S3

Seymour PRO M2

Seymour XT M2

Seymour XTX M2

Block Diagram

AMD's Seymour GPU uses the TeraScale 2 architecture and is made using a 40 nm production process at TSMC. With a die size of 67 mm² and a transistor count of 370 million it is a very small chip. Seymour supports DirectX 11.2 (Feature Level 11_0). For GPU compute applications, OpenCL version 1.2 can be used. It features 160 shading units, 8 texture mapping units and 4 ROPs.

Further reading: TeraScale 2 Instruction Set Architecture

Graphics Processor

Released: Oct 19th, 2010

GPU Name: Seymour

Desktop Variant: Caicos

Generation: Northern Islands

Architecture: TeraScale 2

Foundry: TSMC

Process Size: 40 nm

Transistors: 370 million

Density: 5.5M / mm²

Die Size: 67 mm²

Package: FCBGA-631/962

Graphics Features

DirectX: 11.2 (11_0)

OpenGL: 4.4

OpenCL: 1.2

Vulkan: N/A

Shader Model: 5.0

WDDM: 1.3

Compute: GFX4

DCE: 5.0

UVD: 3.1

Render Config

Shading Units: 160

TMUs: 8

ROPs: 4

Compute Units: 2

Z-Stencil: 16

L1 Cache: 8 KB per CU

L2 Cache: 128 KB

Max. TDP: 25 W

All TeraScale 2 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 Seymour GPU

Name	Chip	Memory	Shaders	TMUs	ROPs	GPU Clock	Memory Clock
AMD Radeon HD 6470M	Seymour XT M2	512 MB	160	8	4	700 MHz	800 MHz
AMD Radeon HD 6450M	Seymour PRO S3	1024 MB	160	8	4	600 MHz	800 MHz
AMD Radeon HD 6430M	Seymour LP S3	1024 MB	160	8	4	480 MHz	800 MHz
AMD Radeon HD 7450M	Seymour XT M2	1024 MB	160	8	4	750 MHz	900 MHz
AMD Radeon HD 7470M	Seymour XTX M2	1024 MB	160	8	4	750 MHz	900 MHz
AMD Radeon HD 7490M	Seymour XTX M2	1024 MB	160	8	4	800 MHz	950 MHz
AMD Radeon HD 6490M	Seymour XTX S3	512 MB	160	8	4	800 MHz	800 MHz
AMD Radeon HD 7430M	Seymour PRO S3	1024 MB	160	8	4	600 MHz	800 MHz
AMD FirePro M3900	Seymour GL	1024 MB	160	8	4	750 MHz	900 MHz
AMD Radeon HD 6490M Mac Edition	Seymour XTX M2	256 MB	160	8	4	750 MHz	794 MHz
AMD Radeon HD 7410M	Seymour LP S3	1024 MB	160	8	4	480 MHz	800 MHz