HD Graphics 620 and GeForce GT 640M Mac Edition - video card comparison
HD Graphics 620
GeForce GT 640M Mac Edition
Architecture
Gen. 9.5 Kaby Lake (2015−2017)
Kepler (2012−2018)
GPU code name
Kaby-Lake GT2
GK107
Market segment
Laptop
Desktop
Release date
August 2016
February 2013
Interface
PCIe 3.0 x1
PCIe 3.0 x16
Boost clock speed
1050 MHz
-
Core clock speed
300 MHz
745 MHz
Floating-point performance
403.2 gflops
572.2 gflops
Manufacturing process technology
14 nm
28 nm
Number of transistors
189 million
1,270 million
Pipelines / CUDA cores
24
384
Power consumption (TDP)
15 Watt
32 Watt
Texture fill rate
25.20
23.84
Memory type
DDR3L/LPDDR3/LPDDR4
GDDR5
Maximum RAM amount
32 GB
512 MB
Memory bus width
64/128 Bit
64 Bit
Memory clock speed
System Shared
5000 MHz
Memory bandwidth
-
40 GB/s
Shared memory
+
-
Display Connectors
No outputs
No outputs
DirectX
12 (12_1)
12 (11_0)
CUDA
-
3.0
OpenCL
2.1
1.2
OpenGL
4.6
4.6
Shader Model
6.4
5.1
Vulkan
+
1.1.126
Quick Sync
+
-