AMD Radeon Pro 555X vs AMD Radeon R9 M390X

VS

AMD Radeon Pro 555X

AMD Radeon R9 M390X

We compared two Mobile platform GPUs: 4GB VRAM Radeon Pro 555X and 4GB VRAM Radeon R9 M390X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon Pro 555X 's Advantages

Released 3 years and 2 months late

AMD Radeon R9 M390X 's Advantages

Larger VRAM bandwidth (160.0GB/s vs 94.08GB/s)

1280 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon Pro 555X

1.393 TFLOPS

Radeon R9 M390X +112%

2.961 TFLOPS

Radeon Pro 555X

VS

Radeon R9 M390X

Graphics Card

Jul 2018

Release Date

May 2015

Radeon Pro Mac

Generation

Crystal System

Mobile

Type

Mobile

PCIe 3.0 x8

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1470 MHz

Memory Clock

1250 MHz

Memory

4GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

94.08GB/s

Bandwidth

160.0GB/s

Render Config

12

Compute Units

32

-

768

Shading Units

2048

48

TMUs

128

16

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

1024 KB

L2 Cache

512 KB

-

Theoretical Performance

14.51 GPixel/s

Pixel Rate

23.14 GPixel/s

43.54 GTexel/s

Texture Rate

92.54 GTexel/s

1393 GFLOPS

FP16 (half)

2.961 TFLOPS

1393 GFLOPS

FP32 (float)

2.961 TFLOPS

87.07 GFLOPS

FP64 (double)

185.1 GFLOPS

Board Design

75W

TDP

75W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Polaris 21

GPU Name

Amethyst

Polaris 21 PRO

GPU Variant

Amethyst XT

GCN 4.0

Architecture

GCN 3.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

3 billion

Transistors

5 billion

123 mm²

Die Size

366 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.1

OpenCL

2.0

1.2

Vulkan

1.2

-

6.4

Shader Model

6.3

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