GeForce GTX 660M Mac Edition and Radeon 780M - video card comparison
GeForce GTX 660M Mac Edition
Radeon 780M
Architecture
Kepler (2012−2018)
RDNA 3
GPU code name
GK107
Phoenix
Market segment
Desktop
Laptop
Release date
April 2013
January 2023
Interface
MXM-B (3.0)
PCIe 4.0 x8
Supplementary power connectors
None
None
Boost clock speed
-
3000 MHz
Core clock speed
950 MHz
1500 MHz
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
4 nm
Number of transistors
1,270 million
25,390 million
Pipelines / CUDA cores
384
768
Power consumption (TDP)
50 Watt
54 Watt (35 - 54 Watt TGP)
Texture fill rate
30.40
139.2
Memory type
GDDR5
System Shared
Maximum RAM amount
512 MB
System Shared
Memory bus width
128 Bit
System Shared
Memory clock speed
5000 MHz
System Shared
Memory bandwidth
80 GB/s
-
Shared memory
-
+
Display Connectors
No outputs
Portable Device Dependent
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
3.0
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.7
Vulkan
1.1.126
1.3