Radeon RX 580 Mobile and Radeon 660M - video card comparison
Radeon RX 580 Mobile
Radeon 660M
Architecture
Polaris (2016−2019)
RDNA 2 (2020−2022)
GPU code name
Polaris
RDNA 2 Rembrandt
Market segment
Laptop
Laptop
Release date
April 2017
January 2022
Interface
MXM-B (3.0)
PCIe 4.0 x8
Supplementary power connectors
-
None
Boost clock speed
1077 MHz
1900 MHz
Core clock speed
1000 MHz
-
Floating-point performance
4,963 gflops
-
Manufacturing process technology
14 nm
6 nm
Number of transistors
5,700 million
13,100 million
Pipelines / CUDA cores
2304
384
Power consumption (TDP)
100 Watt
45 Watt
Texture fill rate
155.1
45.60
Memory type
GDDR5
System Shared
Maximum RAM amount
8 GB
System Shared
Memory bus width
256 Bit
System Shared
Memory clock speed
8000 MHz
System Shared
Memory bandwidth
256.0 GB/s
-
Shared memory
-
-
Display Connectors
No outputs
No outputs
DirectX
12 (12_0)
12 (12_1)
OpenCL
2.0
2.0
OpenGL
4.6
4.6
Shader Model
6.4
6.5
Vulkan
1.2.131
1.2