GeForce GT 640 OEM Rebrand and RTX A40 - video card comparison
GeForce GT 640 OEM Rebrand
RTX A40
Architecture
Fermi 2.0 (2010−2014)
Ampere (2020−2022)
GPU code name
GF116
GA102
Market segment
Desktop
Desktop
Release date
April 2012
October 2020
Interface
PCIe 2.0 x16
PCIe 4.0 x16
Supplementary power connectors
None
8-pin EPS
Boost clock speed
-
1755 MHz
Core clock speed
720 MHz
-
Floating-point performance
414.7 gflops
-
Manufacturing process technology
40 nm
8 nm
Number of transistors
1,170 million
28,300 million
Pipelines / CUDA cores
144
10752
Power consumption (TDP)
75 Watt
300 Watt
Texture fill rate
17.28
589.7
Memory type
DDR3
GDDR6
Maximum RAM amount
1536 MB
48 GB
Memory bus width
192 Bit
384 Bit
Memory clock speed
1600 MHz
14.5 GB/s
Memory bandwidth
38.4 GB/s
695.8 GB/s
Display Connectors
2x DVI, 1x mini-HDMI
3x DisplayPort
HDMI
+
-
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
2.1
8.6
OpenCL
1.1
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
N/A
1.2