GeForce GT 645 OEM and RTX A4000 - video card comparison

GeForce GT 645 OEM

RTX A4000

Architecture

Fermi 2.0 (2010−2014)

Ampere (2020−2022)

GPU code name

GF114

GA104

Market segment

Desktop

Workstation

Release date

April 2012

April 2021

Interface

PCIe 2.0 x16

PCIe 4.0 x16

Supplementary power connectors

-

1x 6-pin

Boost clock speed

-

1560 MHz

Core clock speed

776 MHz

-

Floating-point performance

894.0 gflops

-

Manufacturing process technology

40 nm

8 nm

Number of transistors

1,950 million

17,400 million

Pipelines / CUDA cores

288

6144

Power consumption (TDP)

102 Watt

140 Watt

Texture fill rate

37.25

299.5

Memory type

GDDR5

GDDR6

Maximum RAM amount

1 GB

16 GB

Memory bus width

192 Bit

256 Bit

Memory clock speed

3828 MHz

14 GB/s

Memory bandwidth

91.87 GB/s

448.0 GB/s

Display Connectors

2x DVI, 1x mini-HDMI

4x DisplayPort 1.4a

HDMI

+

-

DirectX

12 (11_0)

12 Ultimate (12_2)

CUDA

2.1

8.6

OpenCL

1.1

3.0

OpenGL

4.6

4.6

Shader Model

5.1

6.7

Vulkan

N/A

1.3