GeForce GT 640 and Radeon R4 (Kaveri) - video card comparison

GeForce GT 640

Radeon R4 (Kaveri)

Architecture

Kepler (2012−2018)

GCN 1.1 (2014)

GPU code name

GK107

Kaveri

Market segment

Desktop

Laptop

Release date

June 2012

June 2014

Interface

PCIe 3.0 x16

Supplementary power connectors

None

Core clock speed

902 MHz

533 MHz

Floating-point performance

692.7 gflops

Manufacturing process technology

28 nm

Number of transistors

1,270 million

2410 Million

Pipelines / CUDA cores

384

192

Power consumption (TDP)

65 Watt

Texture fill rate

28.86

Memory type

DDR3

Maximum RAM amount

2 GB

Memory bus width

128 Bit

64/128 Bit

Memory clock speed

1782 MHz

Memory bandwidth

28.51 GB/s

Shared memory

Display Connectors

1x DVI, 1x HDMI, 1x DisplayPort

HDMI

DirectX

12 (11_0)

12 (FL 12_0)

CUDA

3.0

OpenCL

1.2

OpenGL

4.6

Shader Model

5.1

Vulkan

1.1.126