GeForce GT 640 Rev. 2 and GeForce RTX 4090 - video card comparison
GeForce GT 640 Rev. 2
GeForce RTX 4090
Architecture
Kepler 2.0 (2013−2015)
Ada Lovelace
GPU code name
GK208
AD102-300-A1
Market segment
Desktop
Desktop
Release date
May 2013
September 2022
Interface
PCIe 2.0 x8
PCIe 4.0 x16
Supplementary power connectors
None
1x 16-pin
Boost clock speed
-
2520 MHz
Core clock speed
1046 MHz
2235 MHz
Floating-point performance
803.3 gflops
-
Manufacturing process technology
28 nm
5 nm
Number of transistors
915 million
76,300 million
Pipelines / CUDA cores
384
16384
Power consumption (TDP)
49 Watt
450 Watt
Texture fill rate
33.47
1,290
Memory type
GDDR5
GDDR6X
Maximum RAM amount
1 GB
24 GB
Memory bus width
64 Bit
384 Bit
Memory clock speed
5008 MHz
21000 MHz
Memory bandwidth
40.06 GB/s
1,008 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x VGA
1x HDMI 2.1, 3x DisplayPort 1.4a
HDMI
+
+
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
3.5
8.9
OpenCL
1.2
3.0
OpenGL
4.6
4.6
Shader Model
5.1
6.6
Vulkan
1.1.126
1.3