Radeon HD 8670D and GeForce GTX 660M Mac Edition - video card comparison
Radeon HD 8670D
GeForce GTX 660M Mac Edition
Architecture
Terascale 3 (2010−2013)
Kepler (2012−2018)
GPU code name
Richland
GK107
Market segment
Desktop
Desktop
Release date
June 2013
April 2013
Interface
IGP
MXM-B (3.0)
Supplementary power connectors
-
None
Boost clock speed
950 MHz
-
Core clock speed
844 MHz
950 MHz
Floating-point performance
-
729.6 gflops
Manufacturing process technology
32 nm
28 nm
Number of transistors
1,303 million
1,270 million
Pipelines / CUDA cores
384
384
Power consumption (TDP)
100 Watt
50 Watt
Texture fill rate
22.80
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
11.2 (11_0)
12 (11_0)
CUDA
-
3.0
OpenCL
1.2
1.2
OpenGL
4.4
4.6
Shader Model
5.0
5.1
Vulkan
N/A
1.1.126