GeForce GT 640M and Radeon R2 Graphics - video card comparison

GeForce GT 640M

Radeon R2 Graphics

Architecture

Kepler (2012−2018)

GCN 2.0 (2013−2017)

GPU code name

N13P-GS

Beema

Market segment

Laptop

Desktop

Release date

March 2012

February 2015

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

PCIe 3.0 x16

IGP

Boost clock speed

645 MHz

-

Core clock speed

Up to 625 MHz

351 MHz

CUDA cores

384

-

Floating-point performance

480.0 gflops

179.2 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

1,270 million

930 million

Pipelines / CUDA cores

384

128

Power consumption (TDP)

32 Watt

15 Watt

Texture fill rate

Up to 20.0 billion/sec

2.808

Memory type

DDR3\GDDR5

System Shared

Maximum RAM amount

2 GB

System Shared

Memory bus width

128bit

System Shared

Memory clock speed

1800 - 4000 MHz

System Shared

Memory bandwidth

Up to 64.0 GB/s

-

Shared memory

-

-

Display Connectors

No outputs

No outputs

HDMI

+

-

HDCP

+

-

Maximum VGA resolution

Up to 2048x1536

-

DirectX

12 API

12 (12_0)

CUDA

+

-

OpenCL

1.1

2.0

OpenGL

4.5

4.6

Shader Model

5.1

6.3

Vulkan

1.1.126

1.2.131

3D Blu-Ray

+

-

Optimus

+

-