AMD Topaz

Topaz

Topaz XT

AMD's Topaz GPU uses the GCN 3.0 architecture and is made using a 28 nm production process at TSMC. With a die size of 125 mm² and a transistor count of 1,550 million it is a small chip. Topaz supports DirectX 12 (Feature Level 12_0). For GPU compute applications, OpenCL version 2.1 can be used. It features 384 shading units, 24 texture mapping units and 8 ROPs.

Further reading: GCN 3.0 Instruction Set Architecture

Graphics Processor

Released: 2014

GPU Name: Topaz

Desktop Variant: Iceland

Mobile Variant: Meso / Weston

Mobile Variant 2: Polaris 24

Generation: Volcanic Islands

Architecture: GCN 3.0

Foundry: TSMC

Process Size: 28 nm

Transistors: 1,550 million

Density: 12.4M / mm²

Die Size: 125 mm²

Graphics Features

DirectX: 12 (12_0)

OpenGL: 4.6

OpenCL: 2.1

Vulkan: 1.2.170

Shader Model: 6.5

WDDM: 2.7

Compute: GFX8 (gfx802)

DCE: No Support

UVD: No Support

VCE: No Support

SDMA: 2.0.0

CLRX: GCN 1.2.0

Render Config

Shading Units: 384

TMUs: 24

ROPs: 8

Compute Units: 6

L1 Cache: 16 KB per CU

L2 Cache: 256 KB

All GCN 3.0 GPUs

AMD GPU Architecture History

2024 RDNA 4.0
2024 RDNA 3.5
2023-2024 CDNA 3.0
2022-2024 RDNA 3.0
2021 CDNA 2.0
2020 CDNA 1.0
2020-2024 RDNA 2.0
2019-2020 RDNA 1.0
2018-2022 GCN 5.1
2017-2020 GCN 5.0
2016-2020 GCN 4.0
2014-2019 GCN 3.0
2013-2017 GCN 2.0
2011-2020 GCN 1.0
2010-2013 TeraScale 3
2009-2015 TeraScale 2
2005-2013 TeraScale
2005-2007 Ultra-Threaded SE

Graphics cards using the AMD Topaz GPU

Name	Chip	Memory	Shaders	TMUs	ROPs	Base Clock	Boost Clock	Memory Clock
AMD Radeon R7 M265	Topaz XT	2 GB	384	24	8	900 MHz	980 MHz	900 MHz
AMD Radeon R5 M255	Topaz PRO	2 GB	384	24	8	925 MHz	940 MHz	1000 MHz
AMD Radeon R7 M260	Topaz XT	2 GB	384	24	8	940 MHz	980 MHz	900 MHz
AMD Radeon R7 M270DX	Topaz XT	System Shared	384	24	8	900 MHz	980 MHz	System Shared
AMD Radeon R7 M265DX	Topaz XT	System Shared	384	24	8	900 MHz	980 MHz	System Shared
AMD Radeon R6 M255DX	Topaz PRO	System Shared	384	24	8	925 MHz	940 MHz	System Shared
AMD Radeon R7 M260DX	Topaz PRO	System Shared	384	24	8	925 MHz	940 MHz	System Shared
AMD Radeon R7 M265DX	Topaz PRO	System Shared	384	24	8	925 MHz	940 MHz	System Shared
AMD Radeon R7 A260	Topaz XT	1024 MB	384	24	8	900 MHz	980 MHz	900 MHz
AMD Radeon R5 A255	Topaz PRO	1024 MB	384	24	8	925 MHz	940 MHz	1000 MHz
AMD Radeon R7 M465	Topaz XT	2 GB	384	24	8	730 MHz	1024 MHz	1125 MHz

Topaz GPU Notes

Generation: Volcanic Islands
Desktop Variant: Iceland
Mobile Variant: Meso / Weston / Polaris 24
Graphics/Compute: GFX8 (gfx802)
Display Core Engine: No Support
Unified Video Decoder: No Support
Video Compression Engine: No Support
System DMA: 2.0.0
CLRX: GCN 1.2.0

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