AMD Seymour

Seymour

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

GPU Name: Seymour

Architecture: TeraScale 2

Foundry: TSMC

Process Size: 40 nm

Transistors: 370 million

Density: 5.5M / mm²

Die Size: 67 mm²

Released: Oct 19th, 2010

Graphics Features

DirectX: 11.2 (11_0)

OpenGL: 4.4

OpenCL: 1.2

Vulkan: N/A

Shader Model: 5.0

Compute: GFX4

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

2005-2007 R500
2005-2013 TeraScale
2009-2015 TeraScale 2
2010-2013 TeraScale 3
2011-2020 GCN 1.0
2013-2017 GCN 2.0
2014-2019 GCN 3.0
2016-2020 GCN 4.0
2017-2020 GCN 5.0
2018-2021 GCN 5.1
2019-2020 RDNA 1.0
2020-2022 RDNA 2.0
2020 CDNA 1.0
2021 CDNA 2.0
2022 RDNA 3.0

Graphics cards using the AMD Seymour GPU

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