GeForce 820M and GeForce GT 420M - video card comparison
Passmark - benchmark score GeForce 820M vs GeForce GT 420M
GeForce 820M
511
GeForce GT 420M
417
GeForce 820M
GeForce GT 420M
Architecture
Fermi (2010−2014)
Fermi (2010−2014)
GPU code name
N15V-GM
N11P-GE
Market segment
Laptop
Laptop
Release date
January 2014
September 2010
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
775 MHz
500 MHz
CUDA cores
-
96
Floating-point performance
240.0 gflops
192 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
585 million
585 million
Pipelines / CUDA cores
96
96
Power consumption (TDP)
15 Watt
23 Watt
Texture fill rate
10.00
6.0 billion/sec
Memory type
DDR3
(G)DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
64 Bit
128 Bit
Memory clock speed
1800 MHz
800 MHz
Memory bandwidth
14.4 GB/s
25.6 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 API
CUDA
+
+
OpenCL
1.1
1.1
OpenGL
4.5
4.5
Shader Model
5.1
5.1
Vulkan
N/A
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-