GeForce GTX 660M Mac Edition and Radeon X1950 PRO - video card comparison
GeForce GTX 660M Mac Edition
Radeon X1950 PRO
Architecture
Kepler (2012−2018)
R500 (2005−2007)
GPU code name
GK107
RV570
Market segment
Desktop
Desktop
Release date
April 2013
October 2006
Interface
MXM-B (3.0)
PCIe 1.0 x16
Supplementary power connectors
None
1x 6-pin
Core clock speed
950 MHz
575 MHz
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
80 nm
Number of transistors
1,270 million
330 million
Pipelines / CUDA cores
384
-
Power consumption (TDP)
50 Watt
66 Watt
Texture fill rate
30.40
6.900
Memory type
GDDR5
GDDR3
Maximum RAM amount
512 MB
256 MB
Memory bus width
128 Bit
256 Bit
Memory clock speed
5000 MHz
1380 MHz
Memory bandwidth
80 GB/s
44.16 GB/s
Display Connectors
No outputs
2x DVI, 1x S-Video
DirectX
12 (11_0)
9.0c (9_3)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
2.0
Shader Model
5.1
3.0
Vulkan
1.1.126
N/A