GeForce GT 640 and Quadro K620M - video card comparison
Passmark - benchmark score GeForce GT 640 vs Quadro K620M
GeForce GT 640
1210
Quadro K620M
1200
GeForce GT 640
Quadro K620M
Architecture
Kepler (2012−2018)
Maxwell (2014−2018)
GPU code name
GK107
GM108
Market segment
Desktop
Mobile workstation
Release date
June 2012
March 2015
Interface
PCIe 3.0 x16
MXM-A (3.0)
Supplementary power connectors
None
None
Boost clock speed
-
1124 MHz
Core clock speed
902 MHz
1029 MHz
Floating-point performance
692.7 gflops
863.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
-
Pipelines / CUDA cores
384
384
Power consumption (TDP)
65 Watt
30 Watt
Texture fill rate
28.86
17.98
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
2 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
1782 MHz
2000 MHz
Memory bandwidth
28.51 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
Display Port
-
1.2
HDMI
+
-
DirectX
12 (11_0)
12
CUDA
3.0
+
OpenCL
1.2
1.2
OpenGL
4.6
4.5
Shader Model
5.1
5
Vulkan
1.1.126
1.1.126
nView Display Management
-
+
Optimus
-
+