GeForce GTX 660 OEM and GeForce 940M - video card comparison

GeForce GTX 660 OEM

GeForce 940M

Architecture

Kepler (2012−2018)

Maxwell (2014−2018)

GPU code name

GK104

N16S-GT-S/B

Market segment

Desktop

Laptop

Release date

August 2012

March 2015

Bus support

-

PCI Express 3.0

Interface

PCIe 3.0 x16

PCIe 3.0 x8

Supplementary power connectors

1x 6-pin

-

Boost clock speed

888 MHz

1176 MHz

Core clock speed

823 MHz

1072 MHz

Floating-point performance

2,046 gflops

903.2 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

3,540 million

1,870 million

Pipelines / CUDA cores

1152

384

Power consumption (TDP)

130 Watt

75 Watt

Texture fill rate

85.25

28.22

Memory type

GDDR5

DDR3

Maximum RAM amount

2 GB

4 GB

Memory bus width

256 Bit

64 Bit

Memory clock speed

5600 MHz

2000 MHz

Memory bandwidth

179.2 GB/s

14.4 GB/s

Shared memory

-

-

Display Connectors

2x DVI, 1x HDMI, 1x DisplayPort

No outputs

HDMI

+

-

DirectX

12 (11_0)

12 (11_0)

CUDA

3.0

+

OpenCL

1.2

1.2

OpenGL

4.6

4.5

Shader Model

5.1

5.1

Vulkan

1.1.126

1.1.126

GameWorks

-

+

GPU Boost

-

2.0

Optimus

-

+