GeForce GT 640 and HD Graphics 620 - video card comparison
Passmark - benchmark score GeForce GT 640 vs HD Graphics 620
GeForce GT 640
1209
HD Graphics 620
963
GeForce GT 640
HD Graphics 620
Architecture
Kepler (2012−2018)
Gen. 9.5 Kaby Lake (2015−2017)
GPU code name
GK107
Kaby-Lake GT2
Market segment
Desktop
Laptop
Release date
June 2012
August 2016
Interface
PCIe 3.0 x16
PCIe 3.0 x1
Supplementary power connectors
None
-
Boost clock speed
-
1050 MHz
Core clock speed
902 MHz
300 MHz
Floating-point performance
692.7 gflops
403.2 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
1,270 million
189 million
Pipelines / CUDA cores
384
24
Power consumption (TDP)
65 Watt
15 Watt
Texture fill rate
28.86
25.20
Memory type
DDR3
DDR3L/LPDDR3/LPDDR4
Maximum RAM amount
2 GB
32 GB
Memory bus width
128 Bit
64/128 Bit
Memory clock speed
1782 MHz
System Shared
Memory bandwidth
28.51 GB/s
-
Shared memory
-
+
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
No outputs
HDMI
+
-
DirectX
12 (11_0)
12 (12_1)
CUDA
3.0
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
+
Quick Sync
-
+