GeForce GT 645M and Tegra X1 - video card comparison

GeForce GT 645M

Tegra X1

Architecture

Kepler (2012−2018)

Maxwell 2.0 (2015−2019)

GPU code name

N13P-GS

GM20B

Market segment

Laptop

Desktop

Release date

March 2012

-

Bus support

PCI Express 2.0, PCI Express 3.0

-

Interface

PCIe 3.0 x16

IGP

Core clock speed

Up to 710 MHz

1000 MHz

CUDA cores

384

-

Floating-point performance

544.5 gflops

-

Manufacturing process technology

28 nm

20 nm

Number of transistors

1,270 million

2,000 million

Pipelines / CUDA cores

384

256

Power consumption (TDP)

32 Watt

15 Watt

Texture fill rate

22.7 billion/sec

16.00

Memory type

DDR3\GDDR5

System Shared

Maximum RAM amount

2 GB

System Shared

Memory bus width

128bit

System Shared

Memory clock speed

1800 MHz

System Shared

Memory bandwidth

Up to 64.0 GB/s

-

Shared memory

-

-

Display Connectors

No outputs

No outputs

HDMI

+

-

HDCP

+

-

Maximum VGA resolution

Up to 2048x1536

-

DirectX

12 API

12 (12_1)

CUDA

+

-

OpenCL

1.1

-

OpenGL

4.5

4.6

Shader Model

5.1

-

Vulkan

1.1.126

-

3D Blu-Ray

+

-

Optimus

+

-