GeForce GT 640 and Radeon RX 6450M - video card comparison

GeForce GT 640

Radeon RX 6450M

Architecture

Kepler (2012−2018)

RDNA 2 (2020−2022)

GPU code name

GK107

Navi 24

Market segment

Desktop

Laptop

Release date

June 2012

January 2023

Interface

PCIe 3.0 x16

PCIe 4.0 x4

Supplementary power connectors

None

None

Boost clock speed

-

2220 MHz

Core clock speed

902 MHz

2000 MHz

Floating-point performance

692.7 gflops

-

Manufacturing process technology

28 nm

6 nm

Number of transistors

1,270 million

5,400 million

Pipelines / CUDA cores

384

768

Power consumption (TDP)

65 Watt

25 Watt (25 - 50 Watt TGP)

Texture fill rate

28.86

118.1

Memory type

DDR3

GDDR6

Maximum RAM amount

2 GB

4 GB

Memory bus width

128 Bit

64 Bit

Memory clock speed

1782 MHz

18000 MHz

Memory bandwidth

28.51 GB/s

128.0 GB/s

Shared memory

-

-

Display Connectors

1x DVI, 1x HDMI, 1x DisplayPort

Portable Device Dependent

HDMI

+

-

DirectX

12 (11_0)

12 Ultimate (12_2)

CUDA

3.0

-

OpenCL

1.2

2.2

OpenGL

4.6

4.6

Shader Model

5.1

6.7

Vulkan

1.1.126

1.3