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

GeForce GTX 660 OEM

Radeon 660M

Architecture

Kepler (2012−2018)

RDNA 2 (2020−2022)

GPU code name

GK104

RDNA 2 Rembrandt

Market segment

Desktop

Laptop

Release date

August 2012

January 2022

Interface

PCIe 3.0 x16

PCIe 4.0 x8

Supplementary power connectors

1x 6-pin

None

Boost clock speed

888 MHz

1900 MHz

Core clock speed

823 MHz

-

Floating-point performance

2,046 gflops

-

Manufacturing process technology

28 nm

6 nm

Number of transistors

3,540 million

13,100 million

Pipelines / CUDA cores

1152

384

Power consumption (TDP)

130 Watt

45 Watt

Texture fill rate

85.25

45.60

Memory type

GDDR5

System Shared

Maximum RAM amount

2 GB

System Shared

Memory bus width

256 Bit

System Shared

Memory clock speed

5600 MHz

System Shared

Memory bandwidth

179.2 GB/s

-

Shared memory

-

-

Display Connectors

2x DVI, 1x HDMI, 1x DisplayPort

No outputs

HDMI

+

-

DirectX

12 (11_0)

12 (12_1)

CUDA

3.0

-

OpenCL

1.2

2.0

OpenGL

4.6

4.6

Shader Model

5.1

6.5

Vulkan

1.1.126

1.2