GeForce GTX 660M Mac Edition and GeForce GTX 680MX Mac Edition - video card comparison
GeForce GTX 660M Mac Edition
GeForce GTX 680MX Mac Edition
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK107
GK104
Market segment
Desktop
Desktop
Release date
April 2013
October 2012
Interface
MXM-B (3.0)
PCIe 3.0 x16
Supplementary power connectors
None
-
Core clock speed
950 MHz
719 MHz
Floating-point performance
729.6 gflops
2,209 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
3,540 million
Pipelines / CUDA cores
384
1536
Power consumption (TDP)
50 Watt
122 Watt
Texture fill rate
30.40
92.03
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
2 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
5000 MHz
5000 MHz
Memory bandwidth
80 GB/s
160.0 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_0)
CUDA
3.0
3.0
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.1.126