GeForce GT 640M and Radeon HD 3750 - video card comparison

GeForce GT 640M

Radeon HD 3750

Architecture

Kepler (2012−2018)

TeraScale (2005−2013)

GPU code name

N13P-GS

RV635

Market segment

Laptop

Desktop

Release date

March 2012

September 2008

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

PCIe 3.0 x16

PCIe 2.0 x16

Supplementary power connectors

-

None

Boost clock speed

645 MHz

-

Core clock speed

Up to 625 MHz

796 MHz

CUDA cores

384

-

Floating-point performance

480.0 gflops

191.04 gflops

Manufacturing process technology

28 nm

55 nm

Number of transistors

1,270 million

378 million

Pipelines / CUDA cores

384

120

Power consumption (TDP)

32 Watt

65 Watt

Texture fill rate

Up to 20.0 billion/sec

6.368

Memory type

DDR3\GDDR5

GDDR3

Maximum RAM amount

2 GB

512 MB

Memory bus width

128bit

128 Bit

Memory clock speed

1800 - 4000 MHz

1386 MHz

Memory bandwidth

Up to 64.0 GB/s

22.18 GB/s

Shared memory

-

-

Display Connectors

No outputs

2x DVI, 1x S-Video

HDMI

+

-

HDCP

+

-

Maximum VGA resolution

Up to 2048x1536

-

DirectX

12 API

10.1 (10_1)

CUDA

+

-

OpenCL

1.1

N/A

OpenGL

4.5

3.3

Shader Model

5.1

4.1

Vulkan

1.1.126

N/A

3D Blu-Ray

+

-

Optimus

+

-