GeForce 840A and Radeon R7 (Kaveri) - video card comparison

GeForce 840A

Radeon R7 (Kaveri)

Architecture

Maxwell (2014−2018)

GCN 1.1 (2014)

GPU code name

GM108

Kaveri

Market segment

Desktop

Laptop

Release date

March 2014

June 2014

Interface

PCIe 3.0 x8

-

Boost clock speed

1124 MHz

686 MHz

Core clock speed

1029 MHz

553 MHz

Floating-point performance

863.2 gflops

-

Manufacturing process technology

28 nm

28 nm

Number of transistors

-

2410 Million

Pipelines / CUDA cores

384

512

Power consumption (TDP)

33 Watt

-

Texture fill rate

17.98

-

Memory type

DDR3

-

Maximum RAM amount

2 GB

-

Memory bus width

64 Bit

64/128 Bit

Memory clock speed

2002 MHz

-

Memory bandwidth

16.02 GB/s

-

Shared memory

-

+

Display Connectors

No outputs

-

DirectX

12 (11_0)

12 (FL 12_0)

CUDA

5.0

-

OpenCL

1.2

-

OpenGL

4.6

-

Shader Model

5.1

-

Vulkan

1.1.126

-