GeForce GT 640 and Radeon RX 640 OEM - video card comparison
GeForce GT 640
Radeon RX 640 OEM
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK107
Polaris 23
Market segment
Desktop
Desktop
Release date
June 2012
April 2020
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
None
None
Core clock speed
902 MHz
1295 MHz
Floating-point performance
692.7 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
1,270 million
2,200 million
Pipelines / CUDA cores
384
640
Power consumption (TDP)
65 Watt
50 Watt
Texture fill rate
28.86
51.80
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
4 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
6 GB/s
Memory bandwidth
28.51 GB/s
96 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a
HDMI
+
-
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.7 (6.4)
Vulkan
1.1.126
1.3