GeForce GT 640 Rev. 2 and GeForce GT 640 OEM - video card comparison
GeForce GT 640 Rev. 2
GeForce GT 640 OEM
Architecture
Kepler 2.0 (2013−2015)
Kepler (2012−2018)
GPU code name
GK208
GK107
Market segment
Desktop
Desktop
Release date
May 2013
April 2012
Interface
PCIe 2.0 x8
PCIe 3.0 x16
Supplementary power connectors
None
None
Core clock speed
1046 MHz
797 MHz
Floating-point performance
803.3 gflops
612.1 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
915 million
1,270 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
49 Watt
50 Watt
Texture fill rate
33.47
25.50
Memory type
GDDR5
DDR3
Maximum RAM amount
1 GB
2 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
5008 MHz
1782 MHz
Memory bandwidth
40.06 GB/s
28.51 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x VGA
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 (11_0)
CUDA
3.5
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126