GeForce GTX 680MX Mac Edition and Radeon R9 M390 Mac Edition - video card comparison
GeForce GTX 680MX Mac Edition
Radeon R9 M390 Mac Edition
Architecture
Kepler (2012−2018)
GCN 1.0 (2012−2020)
GPU code name
GK104
Pitcairn
Market segment
Desktop
Desktop
Release date
October 2012
May 2015
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
-
None
Core clock speed
719 MHz
958 MHz
Floating-point performance
2,209 gflops
-
Manufacturing process technology
28 nm
28 nm
Number of transistors
3,540 million
2,800 million
Pipelines / CUDA cores
1536
1024
Power consumption (TDP)
122 Watt
80 Watt
Texture fill rate
92.03
61.31
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
5000 MHz
5.5 GB/s
Memory bandwidth
160.0 GB/s
174.7 GB/s
Display Connectors
No outputs
No outputs
DirectX
12 (11_0)
12 (11_1)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.6
Shader Model
5.1
5.1
Vulkan
1.1.126
1.2