GeForce GTX 680M SLI and Radeon 660M - video card comparison

GeForce GTX 680M SLI

Radeon 660M

Architecture

Kepler (2012−2018)

RDNA 2 (2020−2022)

GPU code name

N13E-GTX

RDNA 2 Rembrandt

Market segment

Laptop

Laptop

Release date

June 2012

January 2022

Interface

-

PCIe 4.0 x8

Supplementary power connectors

-

None

SLI options

+

-

Boost clock speed

-

1900 MHz

Core clock speed

720 MHz

-

Manufacturing process technology

28 nm

6 nm

Number of transistors

-

13,100 million

Pipelines / CUDA cores

2688

384

Power consumption (TDP)

-

45 Watt

Texture fill rate

-

45.60

Memory type

GDDR5

System Shared

Maximum RAM amount

2x 4 GB

System Shared

Memory bus width

2x 256 Bit

System Shared

Memory clock speed

3600 MHz

System Shared

Shared memory

-

-

Display Connectors

-

No outputs

DirectX

11

12 (12_1)

CUDA

+

-

OpenCL

-

2.0

OpenGL

-

4.6

Shader Model

-

6.5

Vulkan

-

1.2

Optimus

+

-