GeForce GTX 660M and Radeon HD 8970 OEM - video card comparison

GeForce GTX 660M

Radeon HD 8970 OEM

Architecture

Kepler (2012−2018)

GCN 1.0 (2012−2020)

GPU code name

N13E-GE

Tahiti

Market segment

Laptop

Desktop

Release date

March 2012

January 2013

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

MXM-B (3.0)

PCIe 3.0 x16

Supplementary power connectors

-

1x 6-pin + 1x 8-pin

SLI options

+

-

Boost clock speed

950 MHz

-

Core clock speed

835 MHz

925 MHz

CUDA cores

384

-

Floating-point performance

729.6 gflops

3,789 gflops

Manufacturing process technology

28 nm

28 nm

Number of transistors

1,270 million

4,313 million

Pipelines / CUDA cores

384

2048

Power consumption (TDP)

50 Watt

250 Watt

Texture fill rate

30.4 billion/sec

118.4

Memory type

GDDR5

GDDR5

Maximum RAM amount

2 GB

3 GB

Memory bus width

128bit

384 Bit

Memory clock speed

2000 MHz

5500 MHz

Memory bandwidth

64.0 GB/s

264.0 GB/s

Shared memory

-

-

Display Connectors

No outputs

1x DVI, 1x HDMI, 2x mini-DisplayPort

HDMI

+

+

HDCP

+

-

Maximum VGA resolution

Up to 2048x1536

-

DirectX

12 API

12 (11_1)

CUDA

+

-

OpenCL

1.1

1.2

OpenGL

4.5

4.6

Shader Model

5.1

5.1

Vulkan

1.1.126

1.2.131

Optimus

+

-