GeForce 820M and Radeon HD 8490 OEM - video card comparison
GeForce 820M
Radeon HD 8490 OEM
Architecture
Fermi (2010−2014)
TeraScale 2 (2009−2015)
GPU code name
N15V-GM
Caicos
Market segment
Laptop
Desktop
Release date
January 2014
July 2013
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Supplementary power connectors
-
None
Core clock speed
775 MHz
875 MHz
Floating-point performance
240.0 gflops
280.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
585 million
370 million
Pipelines / CUDA cores
96
160
Power consumption (TDP)
15 Watt
35 Watt
Texture fill rate
10.00
7.000
Memory type
DDR3
DDR3
Maximum RAM amount
2 GB
1 GB
Memory bus width
64 Bit
64 Bit
Memory clock speed
1800 MHz
1800 MHz
Memory bandwidth
14.4 GB/s
14.4 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x DVI, 1x DisplayPort
DirectX
12 (11_0)
11.2 (11_0)
CUDA
+
-
OpenCL
1.1
1.2
OpenGL
4.5
4.4
Shader Model
5.1
5.0
Vulkan
N/A
N/A
GameWorks
+
-
GPU Boost
2.0
-
Optimus
+
-