Radeon R9 390 X2 and GeForce 940MX - video card comparison

Radeon R9 390 X2

GeForce 940MX

Architecture

GCN 2.0 (2013−2017)

Maxwell (2014−2018)

GPU code name

Grenada

N16S-GTR-B/S

Market segment

Desktop

Laptop

Release date

September 2015

March 2016

Bus support

-

PCI Express 3.0

Interface

PCIe 3.0 x16

PCIe 3.0 x8

Supplementary power connectors

4x 8-pin

None

Boost clock speed

-

1242 MHz

Core clock speed

1000 MHz

1122 MHz

Floating-point performance

2x 5,120 gflops

762.6 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

6,200 million

1,870 million

Pipelines / CUDA cores

2560

384

Power consumption (TDP)

580 Watt

23 Watt

Texture fill rate

160.0

23.83

Memory type

GDDR5

DDR3, GDDR5

Maximum RAM amount

8 GB

4 GB

Memory bus width

512 Bit

64 Bit

Memory clock speed

5400 MHz

4000 MHz

Memory bandwidth

345.6 GB/s

40.1 GB/s

Shared memory

-

-

Display Connectors

2x DVI, 1x HDMI, 1x DisplayPort

No outputs

HDMI

+

-

DirectX

12 (12_0)

12 (11_0)

CUDA

-

+

OpenCL

2.0

1.2

OpenGL

4.6

4.5

Shader Model

6.3

5.1

Vulkan

1.2.131

1.1

GameWorks

-

+

GPU Boost

-

2.0

Optimus

-

+