GeForce 840M and UHD Graphics 620 - video card comparison
Passmark - benchmark score GeForce 840M vs UHD Graphics 620
GeForce 840M
1121
UHD Graphics 620
1061
GeForce 840M
UHD Graphics 620
Architecture
Maxwell (2014−2018)
Gen. 9.5 (2017)
GPU code name
N15S-GT
Kaby-Lake-Refresh GT2
Market segment
Laptop
Laptop
Release date
March 2014
September 2017
Bus support
PCI Express 2.0, PCI Express 3.0
-
Interface
PCIe 3.0 x8
PCIe 3.0 x1
Boost clock speed
1124 MHz
1150 MHz
Core clock speed
1029 MHz
300 MHz
Floating-point performance
863.2 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
-
189 million
Pipelines / CUDA cores
384
24
Power consumption (TDP)
33 Watt
15 Watt
Texture fill rate
17.98
27.60
Memory type
DDR3
LPDDR3/DDR4
Maximum RAM amount
4 GB
32 GB
Memory bus width
64 Bit
System Shared
Memory clock speed
2000 MHz
System Shared
Memory bandwidth
16.02 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (12_1)
CUDA
+
-
OpenCL
1.2
2.1
OpenGL
4.5
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.1.103
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-
Quick Sync
-
+