GeForce GTX 645 OEM and RTX A400 - video card comparison

GeForce GTX 645 OEM

RTX A400

Architecture

Kepler (2012−2018)

Ampere (2020−2022)

GPU code name

GK106

GA107

Market segment

Desktop

Desktop

Release date

April 2013

April 2024

Interface

PCIe 3.0 x16

PCIe 4.0 x8

Supplementary power connectors

None

None

Boost clock speed

-

1762 MHz

Core clock speed

824 MHz

-

Floating-point performance

949.2 gflops

-

Manufacturing process technology

28 nm

8 nm

Number of transistors

2,540 million

8,700 million

Pipelines / CUDA cores

576

768

Power consumption (TDP)

65 Watt

50 Watt

Texture fill rate

39.55

42.29

Memory type

GDDR5

GDDR6

Maximum RAM amount

1 GB

4 GB

Memory bus width

128 Bit

64 Bit

Memory clock speed

4000 MHz

12 GB/s

Memory bandwidth

64 GB/s

96 GB/s

Display Connectors

1x DVI, 1x HDMI, 1x DisplayPort

4x mini-DisplayPort 1.4a

HDMI

+

-

DirectX

12 (11_0)

12 Ultimate (12_2)

CUDA

3.0

8.6

OpenCL

1.2

3.0

OpenGL

4.6

4.6

Shader Model

5.1

6.7

Vulkan

1.1.126

1.3