Radeon Pro 555X and Vega 20 - video card comparison

Radeon Pro 555X

Vega 20

Architecture

Polaris (2016−2019)

GCN 5.1 (2018−2021)

GPU code name

Polaris 21

Vega 20

Market segment

Mobile workstation

Desktop

Release date

June 2017

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Interface

PCIe 3.0 x8

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Supplementary power connectors

None

-

Core clock speed

855 MHz

-

Manufacturing process technology

14 nm

7 nm

Number of transistors

3,000 million

13,230 million

Pipelines / CUDA cores

768

4096

Texture fill rate

43.54

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Memory type

GDDR5

-

Maximum RAM amount

4 GB

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Memory bus width

128 Bit

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Memory clock speed

5080 MHz

-

Memory bandwidth

81.6 GB/s

-

Shared memory

-

-

Display Connectors

No outputs

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DirectX

12 (12_0)

12 (12_1)

OpenCL

2.0

2.1

OpenGL

4.6

4.6

Shader Model

6.4

6.7

Vulkan

1.2.131

1.3

FreeSync

+

-