Radeon HD 8400 and GeForce GTX 660M Mac Edition - video card comparison
Radeon HD 8400
GeForce GTX 660M Mac Edition
Architecture
GCN (2011−2017)
Kepler (2012−2018)
GPU code name
Kabini
GK107
Market segment
Laptop
Desktop
Release date
May 2013
April 2013
Interface
IGP
MXM-B (3.0)
Supplementary power connectors
-
None
Core clock speed
600 MHz
950 MHz
Floating-point performance
-
729.6 gflops
Manufacturing process technology
28 nm
28 nm
Number of transistors
1,178 million
1,270 million
Pipelines / CUDA cores
128
384
Power consumption (TDP)
25 Watt
50 Watt
Texture fill rate
3.200
30.40
Memory type
System Shared
GDDR5
Maximum RAM amount
System Shared
512 MB
Memory bus width
System Shared
128 Bit
Memory clock speed
System Shared
5000 MHz
Memory bandwidth
-
80 GB/s
Shared memory
+
-
Display Connectors
No outputs
No outputs
DirectX
12 (12_0)
12 (11_0)
CUDA
-
3.0
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
5.1
Vulkan
1.2.131
1.1.126