GeForce GTX 660 Rev. 2 and Radeon RX 550 512SP - video card comparison
GeForce GTX 660 Rev. 2
Radeon RX 550 512SP
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK104
Baffin
Market segment
Desktop
Desktop
Release date
September 2014
October 2017
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
1x 6-pin
None
Boost clock speed
1032 MHz
1071 MHz
Core clock speed
980 MHz
-
Floating-point performance
1,981 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
3,540 million
3,000 million
Pipelines / CUDA cores
960
512
Power consumption (TDP)
140 Watt
50 Watt
Texture fill rate
82.56
34.27
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
192 Bit
128 Bit
Memory clock speed
6008 MHz
6 GB/s
Memory bandwidth
144.2 GB/s
96 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (11_0)
12 (12_0)
CUDA
3.0
-
OpenCL
1.2
2.0
OpenGL
4.6
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.2