GeForce 820M and HD Graphics 405 - video card comparison
GeForce 820M
HD Graphics 405
Architecture
Fermi (2010−2014)
Gen. 8 (2015−2016)
GPU code name
N15V-GM
Braswell
Market segment
Laptop
Laptop
Release date
January 2014
April 2016
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 3.0 x1
Boost clock speed
-
700 MHz
Core clock speed
775 MHz
320 MHz
Floating-point performance
240.0 gflops
213.1 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
585 million
189 million
Pipelines / CUDA cores
96
16
Power consumption (TDP)
15 Watt
6 Watt
Texture fill rate
10.00
11.20
Memory type
DDR3
System Shared
Maximum RAM amount
2 GB
System Shared
Memory bus width
64 Bit
64/128 Bit
Memory clock speed
1800 MHz
System Shared
Memory bandwidth
14.4 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_1)
CUDA
+
-
OpenCL
1.1
2.0
OpenGL
4.5
4.3
Shader Model
5.1
5.1
Vulkan
N/A
1.1.80
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-