GeForce 820M and HD Graphics 400 - video card comparison
GeForce 820M
HD Graphics 400
Architecture
Fermi (2010−2014)
Generation 8.0 (2014−2015)
GPU code name
N15V-GM
Braswell GT1
Market segment
Laptop
Desktop
Release date
January 2014
April 2015
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 3.0 x1
Boost clock speed
-
640 MHz
Core clock speed
775 MHz
320 MHz
Floating-point performance
240.0 gflops
134.4 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
585 million
189 million
Pipelines / CUDA cores
96
96
Power consumption (TDP)
15 Watt
6 Watt
Texture fill rate
10.00
7.680
Memory type
DDR3
DDR3L
Maximum RAM amount
2 GB
8 GB
Memory bus width
64 Bit
System Shared
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
+
-