AMD Radeon RX 580X Mobile vs AMD Radeon R9 M390X

VS

AMD Radeon RX 580X Mobile

AMD Radeon R9 M390X

We compared two Mobile platform GPUs: 8GB VRAM Radeon RX 580X Mobile 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 RX 580X Mobile 's Advantages

Released 2 years and 11 months late

Boost Clock1077MHz

More VRAM (8GB vs 4GB)

Larger VRAM bandwidth (256.0GB/s vs 160.0GB/s)

256 additional rendering cores

AMD Radeon R9 M390X 's Advantages

Lower TDP (75W vs 100W)

Score

Benchmark

FP32 (float)

Radeon RX 580X Mobile +67%

4.963 TFLOPS

Radeon R9 M390X

2.961 TFLOPS

Radeon RX 580X Mobile

VS

Radeon R9 M390X

Graphics Card

Apr 2018

Release Date

May 2015

Mobility Radeon

Generation

Crystal System

Mobile

Type

Mobile

MXM-B (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

1000 MHz

Base Clock

-

1077 MHz

Boost Clock

-

2000 MHz

Memory Clock

1250 MHz

Memory

8GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

256.0GB/s

Bandwidth

160.0GB/s

Render Config

36

Compute Units

32

-

2304

Shading Units

2048

144

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

2 MB

L2 Cache

512 KB

-

Theoretical Performance

34.46 GPixel/s

Pixel Rate

23.14 GPixel/s

155.1 GTexel/s

Texture Rate

92.54 GTexel/s

4.963 TFLOPS

FP16 (half)

2.961 TFLOPS

4.963 TFLOPS

FP32 (float)

2.961 TFLOPS

310.2 GFLOPS

FP64 (double)

185.1 GFLOPS

Board Design

100W

TDP

75W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Polaris 20

GPU Name

Amethyst

Polaris 20M XT

GPU Variant

Amethyst XT

GCN 4.0

Architecture

GCN 3.0

GlobalFoundries

Foundry

TSMC

14 nm

Process Size

28 nm

5.7 billion

Transistors

5 billion

232 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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