GeForce GT 620 and GeForce GT 640 OEM - video card comparison

GeForce GT 620

GeForce GT 640 OEM

Architecture

Fermi (2010−2014)

Kepler (2012−2018)

GPU code name

GF108

GK107

Market segment

Desktop

Desktop

Release date

May 2012

April 2012

Bus support

PCI Express 2.0

-

Interface

PCIe 2.0 x16

PCIe 3.0 x16

Supplementary power connectors

None

None

Core clock speed

700 MHz

797 MHz

CUDA cores

96

-

Floating-point performance

268.8 gflops

612.1 gflops

Manufacturing process technology

40 nm

28 nm

Number of transistors

585 million

1,270 million

Pipelines / CUDA cores

96

384

Power consumption (TDP)

49 Watt

50 Watt

Maximum GPU temperature

98 °C

-

Texture fill rate

11.2 billion/sec

25.50

Memory type

DDR3

DDR3

Maximum RAM amount

1 GB

2 GB

Memory bus width

64 Bit

128 Bit

Memory clock speed

1.8 GB/s

1782 MHz

Memory bandwidth

14.4 GB/s

28.51 GB/s

Display Connectors

Dual Link DVI-I, HDMI, VGA

1x DVI, 1x HDMI, 1x DisplayPort

Multi monitor support

+

-

HDMI

+

+

HDCP

+

-

Maximum VGA resolution

2048x1536

-

Audio input for HDMI

Internal

-

DirectX

12 (11_0)

12 (11_0)

CUDA

+

3.0

OpenCL

1.1

1.2

OpenGL

4.2

4.6

Shader Model

5.1

5.1

Vulkan

N/A

1.1.126

3D Blu-Ray

+

-