GeForce GTX 660M Mac Edition and Radeon X550 - video card comparison
GeForce GTX 660M Mac Edition
Radeon X550
Architecture
Kepler (2012−2018)
Rage 9 (2003−2008)
GPU code name
GK107
RV370
Market segment
Desktop
Desktop
Release date
April 2013
July 2005
Interface
MXM-B (3.0)
PCIe 1.0 x16
Supplementary power connectors
None
None
Core clock speed
950 MHz
400 MHz
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
110 nm
Number of transistors
1,270 million
107 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
50 Watt
-
Texture fill rate
30.40
1.600
Memory type
GDDR5
DDR
Maximum RAM amount
512 MB
128 MB
Memory bus width
128 Bit
128 Bit
Memory clock speed
5000 MHz
500 MHz
Memory bandwidth
80 GB/s
8 GB/s
Display Connectors
No outputs
1x DVI, 1x VGA, 1x S-Video
DirectX
12 (11_0)
9.0
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
-
Vulkan
1.1.126
N/A