AMD Radeon Pro 555X: GPU Specs & Benchmarks

The Radeon Pro 555X is a graphics card by AMD, built on the 14 nm process and based on the Polaris 21 graphics processor (GPU). The video card specifications and performance tests (benchmarks) are listed below.

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Graphics Processor (GPU)

GPU Name

Polaris 21

Model number

Polaris 21 PRO

Architecture

GCN 4.0

Foundry

GlobalFoundries

Process Size

14 nm

Transistors

3,000 million

Die Size

123 mm²

Graphics Card

Release Date

Jul 16th, 2018

Family

Radeon Pro Mac
(500X Series)

Production

Active

Bus Interface

PCIe 3.0 x8

Memory

Memory Size

4 GB

Memory Type

GDDR5

Memory Bus

128 bit

Bandwidth

94.08 GB/s

Performance

Pixel fillrate

14.51 GPixel/s

Texture fillrate

43.54 GTexel/s

FP16 (half) performance

1,393 GFLOPS (1:1)

FP32 (float) performance

1,393 GFLOPS

FP64 (double) performance

87.07 GFLOPS (1:16)

Clock Speeds

Memory Clock

1470 MHz
5.9 Gbps effective

GPU Clock

907 MHz

Render Config

Shading Units

768

TMUs

48

ROPs

16

Compute Units

12

L1 Cache

16 KB (per CU)

L2 Cache

1024 KB

Board Design

Slot Width

IGP

Thermal design power (TDP)

75 W

Display Connectors

No outputs

Power Connectors

None

API support

DirectX

12 (12_0)

OpenGL

4.6

OpenCL

2.1

Vulkan

1.2

Shader Model

6.4