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AMD Heathrow

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Heathrow
Block Diagram
Block Diagram
CU Diagram
CU Diagram
LDS Diagram
LDS Diagram
AMD's Heathrow GPU uses the GCN 1.0 architecture and is made using a 28 nm production process at TSMC. With a die size of 123 mm² and a transistor count of 1,500 million it is a small chip. Heathrow supports DirectX 12 (Feature Level 11_1). For GPU compute applications, OpenCL version 1.2 can be used. It features 640 shading units, 40 texture mapping units and 16 ROPs.
Further reading: GCN 1.0 Architecture Whitepaper , Southern Islands Instruction Set Architecture

Graphics Processor

GPU Name
Heathrow
Architecture
GCN 1.0
Foundry
TSMC
Process Size
28 nm
Transistors
1,500 million
Density
12.2M / mm²
Die Size
123 mm²
Released
Apr 24th, 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
640
TMUs
40
ROPs
16
Compute Units
10
Z-Stencil
64
ACEs
2
GEs
1
L1 Cache
16 KB per CU
L2 Cache
256 KB
Max. TDP
45 W

All GCN 1.0 GPUs

AMD GPU Architecture History

Graphics cards using the AMD Heathrow GPU

Name Chip Memory Shaders TMUs ROPs GPU Clock Memory Clock
AMD Radeon HD 7850M Heathrow PRO 2 GB 640 40 16 675 MHz 1000 MHz
AMD Radeon HD 7870M Heathrow XT 2 GB 640 40 16 800 MHz 1000 MHz
AMD FirePro M6000 Heathrow XT GL 2 GB 640 40 16 800 MHz 1000 MHz

Heathrow GPU Notes

Architecture Codename: Southern Islands
Chip Variant: Cape Verde
CLRX Version: GCN 1.0
Graphics/Compute: GFX6 (gfx601)
Display Core Engine: 6.0
Unified Video Decoder: 4.0
Video Compression Engine: 1.0
Jul 2nd, 2022 00:58 EDT change timezone

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