Radeon R7 M340 and GeForce 620M - video card comparison

Radeon R7 M340

GeForce 620M

Architecture

GCN (2011−2017)

Fermi 2.0 (2010−2014)

GPU code name

Meso Pro DDR3

GF117

Market segment

Laptop

Desktop

Release date

June 2015

March 2012

Bus support

PCIe 3.0

-

Interface

PCIe 3.0 x8

PCIe 2.0 x16

Supplementary power connectors

None

-

Boost clock speed

1021 MHz

-

Compute units

6

-

Core clock speed

1021 MHz

625 MHz

Floating-point performance

549.1 gflops

240.0 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

950 million

585 million

Pipelines / CUDA cores

320

96

Power consumption (TDP)

-

15 Watt

Texture fill rate

17.16

10.00

Memory type

DDR3

DDR3

Maximum RAM amount

4 GB

1 GB

Memory bus width

128 Bit

64 Bit

Memory clock speed

1000 MHz

1800 MHz

Memory bandwidth

16 GB/s

14.4 GB/s

Shared memory

-

-

Display Connectors

No outputs

No outputs

Eyefinity

1

-

DirectX

DirectX® 12

12 (11_0)

CUDA

-

2.1

Mantle

+

-

OpenCL

Not Listed

1.1

OpenGL

4.4

4.6

Shader Model

5.1

5.1

Vulkan

+

N/A

AppAcceleration

-

-

DualGraphics

1

-

Enduro

-

-

FreeSync

1

-

HD3D

+

-

PowerTune

+

-

Switchable graphics

1

-

TrueAudio

-

-

ZeroCore

+

-