GeForce 820M and GeForce 8400 GS PCI - video card comparison
GeForce 820M
GeForce 8400 GS PCI
Architecture
Fermi (2010−2014)
Tesla 2.0 (2007−2013)
GPU code name
N15V-GM
GT218
Market segment
Laptop
Desktop
Release date
January 2014
April 2007
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCI
Supplementary power connectors
-
None
Core clock speed
775 MHz
520 MHz
Floating-point performance
240.0 gflops
39.36 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
585 million
260 million
Pipelines / CUDA cores
96
16
Power consumption (TDP)
15 Watt
40 Watt
Texture fill rate
10.00
4.160
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
64 Bit
64 Bit
Memory clock speed
1800 MHz
1000 MHz
Memory bandwidth
14.4 GB/s
8 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (11_0)
11.1 (10_1)
CUDA
+
1.2
OpenCL
1.1
1.1
OpenGL
4.5
3.3
Shader Model
5.1
4.1
Vulkan
N/A
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-