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AMD Pitcairn

Pitcairn

Pitcairn PRO

Pitcairn XT

Block Diagram

CU Diagram

LDS Diagram

AMD's Pitcairn GPU uses the GCN 1.0 architecture and is made using a 28 nm production process at TSMC. With a die size of 212 mm² and a transistor count of 2,800 million it is a medium-sized chip. Pitcairn supports DirectX 12 (Feature Level 11_1). For GPU compute applications, OpenCL version 1.2 can be used. It features 1280 shading units, 80 texture mapping units and 32 ROPs.

Further reading: GCN 1.0 Architecture Whitepaper

, Southern Islands Instruction Set Architecture

Graphics Processor

GPU Name: Pitcairn

Architecture: GCN 1.0

Foundry: TSMC

Process Size: 28 nm

Transistors: 2,800 million

Density: 13.2M / mm²

Die Size: 212 mm²

Released: Mar 5th, 2012

Graphics Features

DirectX: 12 (11_1)

OpenGL: 4.6

OpenCL: 1.2

Vulkan: 1.2

Shader Model: 5.1

Compute: GFX6

ROCm: No

Render Config

Shading Units: 1280

TMUs: 80

ROPs: 32

Compute Units: 20

Z-Stencil: 128

ACEs: 2

GEs: 2

L1 Cache: 16 KB per CU

L2 Cache: 512 KB

Max. TDP: 175 W

All GCN 1.0 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
2020-2021 RDNA 2.0
2020-2020 CDNA 1.0

Graphics cards using the AMD Pitcairn GPU

Name	Chip	Memory	Shaders	TMUs	ROPs	GPU Clock	Memory Clock
AMD Radeon HD 7870 GHz Edition	Pitcairn XT	2 GB	1280	80	32	1000 MHz	1200 MHz
AMD FirePro W7000	Pitcairn XT GL	4 GB	1280	80	32	950 MHz	1200 MHz
AMD FirePro W5000	Pitcairn LE GL	2 GB	768	48	32	825 MHz	800 MHz
AMD FirePro S7000	Pitcairn XT GL	4 GB	1280	80	32	950 MHz	1200 MHz
AMD Radeon HD 7850	Pitcairn PRO	2 GB	1024	64	32	860 MHz	1200 MHz
AMD FirePro W4000	Pitcairn LE GL	2 GB	768	48	32	825 MHz	800 MHz
AMD FirePro W5000 DVI	Pitcairn LE GL	2 GB	768	48	32	825 MHz	800 MHz
AMD FirePro R5000	Pitcairn LE GL	2 GB	768	48	32	825 MHz	800 MHz
AMD Radeon Sky 500	Pitcairn XT GL	4 GB	1280	80	32	950 MHz	1200 MHz
AMD Radeon HD 8870 OEM	Pitcairn XT	2 GB	1280	80	32	1000 MHz	1200 MHz
AMD FirePro D300	Pitcairn XT GL	2 GB	1280	80	32	850 MHz	1270 MHz
AMD Radeon R7 265	Pitcairn PRO	2 GB	1024	64	32	900 MHz	1400 MHz
AMD Radeon R9 270 1024SP	Pitcairn PRO	2 GB	1024	64	32	900 MHz	1200 MHz
AMD Radeon R9 M390 Mac Edition	Pitcairn PRO	2 GB	1024	64	32	958 MHz	1365 MHz
AMD Radeon R9 M290X Mac Edition	Pitcairn PRO	2 GB	1024	64	32	850 MHz	1365 MHz

Pitcairn GPU Notes

Architecture Codename: Southern Islands
CLRX Version: GCN 1.0
Graphics/Compute: GFX6 (gfx601)
Display Core Engine: 6.0
Unified Video Decoder: 4.0
Video Compression Engine: 1.0