GeForce 820A and Radeon HD 6490M Mac Edition - video card comparison
GeForce 820A
Radeon HD 6490M Mac Edition
Architecture
Fermi 2.0 (2010−2014)
TeraScale 2 (2009−2015)
GPU code name
GF117
Seymour
Market segment
Desktop
Desktop
Release date
March 2014
May 2011
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
775 MHz
750 MHz
Floating-point performance
297.6 gflops
240 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
-
Texture fill rate
12.40
6.000
Memory type
DDR3
GDDR5
Maximum RAM amount
1 GB
256 MB
Memory bus width
64 Bit
64 Bit
Memory clock speed
1800 MHz
3176 MHz
Memory bandwidth
14.4 GB/s
25.41 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
11.2 (11_0)
CUDA
2.1
-
OpenCL
1.1
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
N/A
N/A