GeForce GTX 645 OEM and Radeon RX 6400 - video card comparison

GeForce GTX 645 OEM

Radeon RX 6400

Architecture

Kepler (2012−2018)

RDNA 2.0 (2020−2022)

GPU code name

GK106

Navi 24

Market segment

Desktop

Release date

April 2013

January 2022

Interface

PCIe 3.0 x16

PCIe 4.0 x4

Supplementary power connectors

None

Boost clock speed

2321 MHz

Core clock speed

824 MHz

Floating-point performance

949.2 gflops

Manufacturing process technology

28 nm

6 nm

Number of transistors

2,540 million

5,400 million

Pipelines / CUDA cores

576

768

Power consumption (TDP)

65 Watt

53 Watt

Texture fill rate

39.55

111.4

Memory type

GDDR5

GDDR6

Maximum RAM amount

1 GB

4 GB

Memory bus width

128 Bit

64 Bit

Memory clock speed

4000 MHz

16 GB/s

Memory bandwidth

64 GB/s

128.0 GB/s

Display Connectors

1x DVI, 1x HDMI, 1x DisplayPort

1x HDMI 2.1, 1x DisplayPort 1.4a

HDMI

DirectX

12 (11_0)

12 Ultimate (12_2)

CUDA

3.0

OpenCL

1.2

2.2

OpenGL

4.6

Shader Model

5.1

6.6

Vulkan

1.1.126

1.3