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). 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: 20 W

All TeraScale 2 GPUs

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

Seymour GPU Notes

Architecture Codename: Northern Islands
Chip Variant: Caicos
Graphics/Compute: GFX4
Display Core Engine: 5.0
Unified Video Decoder: 3.1