AMD Heathrow
Heathrow
Block Diagram
CU 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). It features 640 shading units, 40 texture mapping units and 16 ROPs.
Further reading:
GCN 1.0 Architecture Whitepaper 
, Southern Islands Instruction Set Architecture
, 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
- 1.2.131
- 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 |