GeForce GTX 660M Mac Edition and Radeon R7 M520 - video card comparison
GeForce GTX 660M Mac Edition
Radeon R7 M520
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK107
Oland
Market segment
Desktop
Desktop
Release date
April 2013
April 2017
Interface
MXM-B (3.0)
PCIe 3.0 x8
Supplementary power connectors
None
None
Core clock speed
950 MHz
1030 MHz
Floating-point performance
729.6 gflops
659.2 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,270 million
1,040 million
Pipelines / CUDA cores
384
320
Power consumption (TDP)
50 Watt
50 Watt
Texture fill rate
30.40
20.60
Memory type
GDDR5
DDR3
Maximum RAM amount
512 MB
2 GB
Memory bus width
128 Bit
64 Bit
Memory clock speed
5000 MHz
2000 MHz
Memory bandwidth
80 GB/s
16 GB/s
Display Connectors
No outputs
1x DVI, 1x HDMI, 1x VGA
HDMI
-
+
DirectX
12 (11_0)
12.0
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.0
Vulkan
1.1.126
-