GeForce GTX 660M Mac Edition and Radeon HD 6970 X2 - video card comparison
GeForce GTX 660M Mac Edition
Radeon HD 6970 X2
Architecture
Kepler (2012−2018)
TeraScale 3 (2010−2013)
GPU code name
GK107
Antilles
Market segment
Desktop
Desktop
Release date
April 2013
-
Interface
MXM-B (3.0)
PCIe 2.0 x16
Supplementary power connectors
None
3x 8-pin
Core clock speed
950 MHz
880 MHz
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
40 nm
Number of transistors
1,270 million
2,640 million
Pipelines / CUDA cores
384
1536
Power consumption (TDP)
50 Watt
375 Watt
Texture fill rate
30.40
84.48
Memory type
GDDR5
GDDR5
Maximum RAM amount
512 MB
2 GB
Memory bus width
128 Bit
256 Bit
Memory clock speed
5000 MHz
5.5 GB/s
Memory bandwidth
80 GB/s
176.0 GB/s
Display Connectors
No outputs
2x DVI, 1x HDMI 1.4a, 2x mini-DisplayPort 1.2
HDMI
-
+
DirectX
12 (11_0)
11.2 (11_0)
CUDA
3.0
-
OpenCL
1.2
1.2
OpenGL
4.6
4.4
Shader Model
5.1
5.0
Vulkan
1.1.126
N/A