GeForce GTX 660M and GeForce GTX 950M Mac Edition - video card comparison

GeForce GTX 660M

GeForce GTX 950M Mac Edition

Architecture

Kepler (2012−2018)

Maxwell (2014−2018)

GPU code name

N13E-GE

GM107

Market segment

Laptop

Desktop

Release date

March 2012

March 2015

Bus support

PCI Express 2.0, PCI Express 3.0

Interface

MXM-B (3.0)

SLI options

Boost clock speed

950 MHz

1124 MHz

Core clock speed

835 MHz

993 MHz

CUDA cores

384

Floating-point performance

729.6 gflops

1,271 gflops

Manufacturing process technology

28 nm

Number of transistors

1,270 million

1,870 million

Pipelines / CUDA cores

384

640

Power consumption (TDP)

50 Watt

75 Watt

Texture fill rate

30.4 billion/sec

44.96

Memory type

GDDR5

DDR3

Maximum RAM amount

2 GB

Memory bus width

128bit

128 Bit

Memory clock speed

2000 MHz

1800 MHz

Memory bandwidth

64.0 GB/s

28.8 GB/s

Shared memory

Display Connectors

No outputs

HDMI

HDCP

Maximum VGA resolution

Up to 2048x1536

DirectX

12 API

12 (11_0)

CUDA

5.0

OpenCL

1.1

1.2

OpenGL

4.5

4.6

Shader Model

5.1

Vulkan

1.1.126

Optimus