GeForce GT 640 OEM and Radeon RX 6400 - video card comparison
GeForce GT 640 OEM
Radeon RX 6400
Architecture
Kepler (2012−2018)
RDNA 2.0 (2020−2022)
GPU code name
GK107
Navi 24
Market segment
Desktop
Desktop
Release date
April 2012
January 2022
Interface
PCIe 3.0 x16
PCIe 4.0 x4
Supplementary power connectors
None
None
Boost clock speed
-
2321 MHz
Core clock speed
797 MHz
-
Floating-point performance
612.1 gflops
-
Manufacturing process technology
28 nm
6 nm
Number of transistors
1,270 million
5,400 million
Pipelines / CUDA cores
384
768
Power consumption (TDP)
50 Watt
53 Watt
Texture fill rate
25.50
111.4
Memory type
DDR3
GDDR6
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
16 GB/s
Memory bandwidth
28.51 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
4.6
Shader Model
5.1
6.6
Vulkan
1.1.126
1.3