UHD Graphics 620 and GeForce GT 640 Rev. 2 - video card comparison
UHD Graphics 620
GeForce GT 640 Rev. 2
Architecture
Gen. 9.5 (2017)
Kepler 2.0 (2013−2015)
GPU code name
Kaby-Lake-Refresh GT2
GK208
Market segment
Laptop
Desktop
Release date
September 2017
May 2013
Interface
PCIe 3.0 x1
PCIe 2.0 x8
Supplementary power connectors
-
None
Boost clock speed
1150 MHz
-
Core clock speed
300 MHz
1046 MHz
Floating-point performance
-
803.3 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
189 million
915 million
Pipelines / CUDA cores
24
384
Power consumption (TDP)
15 Watt
49 Watt
Texture fill rate
27.60
33.47
Memory type
LPDDR3/DDR4
GDDR5
Maximum RAM amount
32 GB
1 GB
Memory bus width
System Shared
64 Bit
Memory clock speed
System Shared
5008 MHz
Memory bandwidth
-
40.06 GB/s
Shared memory
+
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (12_1)
12 (11_0)
CUDA
-
3.5
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
1.1.103
1.1.126
Quick Sync
+
-