AMD Radeon R9 M390X vs AMD Radeon RX 580X Mobile

VS

AMD Radeon R9 M390X

AMD Radeon RX 580X Mobile

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M390X and 8GB VRAM Radeon RX 580X Mobile to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M390X 's Advantages

Lower TDP (75W vs 100W)

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

Score

Benchmark

FP32 (float)

Radeon R9 M390X

2.961 TFLOPS

Radeon RX 580X Mobile +67%

4.963 TFLOPS

Radeon R9 M390X

VS

Radeon RX 580X Mobile

Graphics Card

May 2015

Release Date

Apr 2018

Crystal System

Generation

Mobility Radeon

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-B (3.0)

Clock Speeds

-

Base Clock

1000 MHz

-

Boost Clock

1077 MHz

1250 MHz

Memory Clock

2000 MHz

Memory

4GB

Memory Size

8GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

160.0GB/s

Bandwidth

256.0GB/s

Render Config

32

Compute Units

36

-

2048

Shading Units

2304

128

TMUs

144

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

2 MB

-

Theoretical Performance

23.14 GPixel/s

Pixel Rate

34.46 GPixel/s

92.54 GTexel/s

Texture Rate

155.1 GTexel/s

2.961 TFLOPS

FP16 (half)

4.963 TFLOPS

2.961 TFLOPS

FP32 (float)

4.963 TFLOPS

185.1 GFLOPS

FP64 (double)

310.2 GFLOPS

Board Design

75W

TDP

100W

-

No outputs

Outputs

No outputs

None

Power Connectors

None

Graphics Processor

Amethyst

GPU Name

Polaris 20

Amethyst XT

GPU Variant

Polaris 20M XT

GCN 3.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

5 billion

Transistors

5.7 billion

366 mm²

Die Size

232 mm²

Graphics Features

12 (12_0)

DirectX

12 (12_0)

4.6

OpenGL

4.6

2.0

OpenCL

2.1

1.2

Vulkan

1.2

-

6.3

Shader Model

6.4

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