GeForce 820M and Radeon HD 6630M Mac Edition - video card comparison
GeForce 820M
Radeon HD 6630M Mac Edition
Architecture
Fermi (2010−2014)
TeraScale 2 (2009−2015)
GPU code name
N15V-GM
Whistler
Market segment
Laptop
Desktop
Release date
January 2014
January 2011
Bus support
PCI Express 2.0
-
Interface
PCIe 2.0 x16
PCIe 2.0 x16
Core clock speed
775 MHz
500 MHz
Floating-point performance
240.0 gflops
480.0 gflops
Manufacturing process technology
28 nm
40 nm
Number of transistors
585 million
716 million
Pipelines / CUDA cores
96
480
Power consumption (TDP)
15 Watt
26 Watt
Texture fill rate
10.00
12.00
Memory type
DDR3
GDDR5
Maximum RAM amount
2 GB
256 MB
Memory bus width
64 Bit
64 Bit
Memory clock speed
1800 MHz
2400 MHz
Memory bandwidth
14.4 GB/s
19.2 GB/s
Shared memory
-
-
Display Connectors
No outputs
No outputs
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
+
-