Radeon R9 M390X and Radeon R6 M340DX - video card comparison

Radeon R9 M390X

Radeon R6 M340DX

Architecture

GCN 3 (2014−2016)

GCN (2011−2017)

GPU code name

Amethyst (XT) / Tonga

Jet

Market segment

Laptop

Laptop

Release date

June 2015

June 2015

Bus support

PCIe 3.0

-

Interface

PCIe 3.0 x16

IGP

Supplementary power connectors

None

-

Boost clock speed

-

1030 MHz

Core clock speed

723 MHz

-

Floating-point performance

2,961 gflops

-

Manufacturing process technology

28 nm

28 nm

Number of transistors

5,000 million

690 million

Pipelines / CUDA cores

2048

704

Power consumption (TDP)

100 Watt

-

Texture fill rate

92.54

24.72

Memory type

GDDR5

DDR3

Maximum RAM amount

4 GB

System Shared

Memory bus width

256 Bit

System Shared

Memory clock speed

-

System Shared

Memory bandwidth

160.0 GB/s

-

Shared memory

-

-

Display Connectors

No outputs

No outputs

Eyefinity

1

-

DirectX

DirectX® 12

12 (11_1)

Mantle

+

-

OpenCL

Not Listed

1.2

OpenGL

4.4

4.6

Shader Model

6.3

5.1

Vulkan

+

1.2.131

AppAcceleration

-

-

DualGraphics

1

-

Enduro

-

-

FreeSync

1

-

HD3D

+

-

PowerTune

+

-

Switchable graphics

1

-

TrueAudio

-

-

ZeroCore

+

-