GeForce GTX 660M Mac Edition and Radeon RX 6650 XT - video card comparison
GeForce GTX 660M Mac Edition
Radeon RX 6650 XT
Architecture
Kepler (2012−2018)
Navi / RDNA2 (2020−2022)
GPU code name
GK107
Navi 23
Market segment
Desktop
Desktop
Release date
April 2013
May 2022
Interface
MXM-B (3.0)
PCIe 4.0 x8
Supplementary power connectors
None
1x 8-pin
Boost clock speed
-
2635 MHz
Core clock speed
950 MHz
2055 MHz
Floating-point performance
729.6 gflops
-
Manufacturing process technology
28 nm
7 nm
Number of transistors
1,270 million
11,060 million
Pipelines / CUDA cores
384
2048
Power consumption (TDP)
50 Watt
176 Watt
Texture fill rate
30.40
337.3
Memory type
GDDR5
GDDR6
Maximum RAM amount
512 MB
8 GB
Memory bus width
128 Bit
128 Bit
Memory clock speed
5000 MHz
17500 MHz
Memory bandwidth
80 GB/s
280.3 GB/s
Display Connectors
No outputs
1x HDMI 2.1, 3x DisplayPort 1.4a
HDMI
-
+
DirectX
12 (11_0)
12 Ultimate (12_2)
CUDA
3.0
-
OpenCL
1.2
2.1
OpenGL
4.6
4.6
Shader Model
5.1
6.5
Vulkan
1.1.126
1.3