Quadro K620 and GeForce GT 640 Rev. 2 - video card comparison
Quadro K620
GeForce GT 640 Rev. 2
Architecture
Maxwell (2014−2018)
Kepler 2.0 (2013−2015)
GPU code name
GM107
GK208
Market segment
Workstation
Desktop
Release date
July 2014
May 2013
Interface
PCIe 2.0 x16
PCIe 2.0 x8
Supplementary power connectors
None
None
Boost clock speed
1124 MHz
-
Core clock speed
1058 MHz
1046 MHz
Floating-point performance
863.2 gflops
803.3 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,870 million
915 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
41 Watt
49 Watt
Texture fill rate
26.98
33.47
Memory type
128 Bit
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1800 MHz
5008 MHz
Memory bandwidth
Up to 29 GB/s
40.06 GB/s
Display Connectors
DVI-I DP
1x DVI, 1x HDMI, 1x VGA
Number of simultaneous displays
4
-
HDMI
-
+
DirectX
12
12 (11_0)
CUDA
5.0
3.5
OpenCL
1.2
1.2
OpenGL
4.5
4.6
Shader Model
5
5.1
Vulkan
+
1.1.126
3D Vision Pro
+
-
Mosaic
+
-
nView Desktop Management
+
-