GeForce GT 640 and C68 - video card comparison

GeForce GT 640

C68

Architecture

Kepler (2012−2018)

Curie (2003−2013)

GPU code name

GK107

C68

Market segment

Desktop

Desktop

Release date

June 2012

-

Interface

PCIe 3.0 x16

-

Supplementary power connectors

None

-

Core clock speed

902 MHz

-

Floating-point performance

692.7 gflops

-

Manufacturing process technology

28 nm

90 nm

Number of transistors

1,270 million

112 million

Pipelines / CUDA cores

384

-

Power consumption (TDP)

65 Watt

-

Texture fill rate

28.86

-

Memory type

DDR3

-

Maximum RAM amount

2 GB

-

Memory bus width

128 Bit

-

Memory clock speed

1782 MHz

-

Memory bandwidth

28.51 GB/s

-

Display Connectors

1x DVI, 1x HDMI, 1x DisplayPort

-

HDMI

+

-

DirectX

12 (11_0)

9.0c (9_3)

CUDA

3.0

-

OpenCL

1.2

N/A

OpenGL

4.6

2.0 (full) Shader Model5.13.0

Vulkan

1.1.126

N/A

PureVideo HD

-

VP1