GeForce GT 640 and GeForce GTX 490 - video card comparison

GeForce GT 640

GeForce GTX 490

Architecture

Kepler (2012−2018)

Fermi (2010−2014)

GPU code name

GK107

GF100

Market segment

Desktop

Release date

June 2012

Interface

PCIe 3.0 x16

PCIe 2.0 x16

Supplementary power connectors

None

2x 8-pin

Core clock speed

902 MHz

608 MHz

Floating-point performance

692.7 gflops

Manufacturing process technology

28 nm

40 nm

Number of transistors

1,270 million

3,100 million

Pipelines / CUDA cores

384

480

Power consumption (TDP)

65 Watt

365 Watt

Texture fill rate

28.86

36.48

Memory type

DDR3

GDDR5

Maximum RAM amount

2 GB

1536 MB

Memory bus width

128 Bit

384 Bit

Memory clock speed

1782 MHz

3.4 GB/s

Memory bandwidth

28.51 GB/s

164.0 GB/s

Display Connectors

1x DVI, 1x HDMI, 1x DisplayPort

3x DVI, 1x mini-DisplayPort

HDMI

DirectX

12 (11_0)

CUDA

3.0

2.0

OpenCL

1.2

1.1

OpenGL

4.6

Shader Model

5.1

Vulkan

1.1.126

N/A