GeForce GTX 780M Mac Edition and GeForce GTX 660M Mac Edition - video card comparison
GeForce GTX 780M Mac Edition
GeForce GTX 660M Mac Edition
Architecture
Kepler (2012−2018)
Kepler (2012−2018)
GPU code name
GK104
GK107
Market segment
Desktop
Desktop
Release date
November 2013
April 2013
Interface
MXM-B (3.0)
MXM-B (3.0)
Supplementary power connectors
-
None
Boost clock speed
797 MHz
-
Core clock speed
771 MHz
950 MHz
Floating-point performance
2,448 gflops
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
1,270 million
Pipelines / CUDA cores
1536
384
Power consumption (TDP)
122 Watt
50 Watt
Texture fill rate
102.0
30.40
Memory type
GDDR5
GDDR5
Maximum RAM amount
4 GB
512 MB
Memory bus width
256 Bit
128 Bit
Memory clock speed
5000 MHz
5000 MHz
Memory bandwidth
160.0 GB/s
80 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