Quadro K620 and GeForce GTX 645 OEM - video card comparison
Quadro K620
GeForce GTX 645 OEM
Architecture
Maxwell (2014−2018)
Kepler (2012−2018)
GPU code name
GM107
GK106
Market segment
Workstation
Desktop
Release date
July 2014
April 2013
Interface
PCIe 2.0 x16
PCIe 3.0 x16
Supplementary power connectors
None
None
Boost clock speed
1124 MHz
-
Core clock speed
1058 MHz
824 MHz
Floating-point performance
863.2 gflops
949.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,870 million
2,540 million
Pipelines / CUDA cores
384
576
Power consumption (TDP)
41 Watt
65 Watt
Texture fill rate
26.98
39.55
Memory type
128 Bit
GDDR5
Maximum RAM amount
2 GB
1 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1800 MHz
4000 MHz
Memory bandwidth
Up to 29 GB/s
64 GB/s
Display Connectors
DVI-I DP
1x DVI, 1x HDMI, 1x DisplayPort
Number of simultaneous displays
4
-
HDMI
-
+
DirectX
12
12 (11_0)
CUDA
5.0
3.0
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
+
-