GeForce GTX 660 and Radeon RX 550 640SP - video card comparison
GeForce GTX 660
Radeon RX 550 640SP
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK106
Baffin
Market segment
Desktop
Desktop
Release date
September 2012
October 2017
Bus support
PCI Express 3.0
-
Interface
PCIe 3.0 x16
PCIe 3.0 x8
Supplementary power connectors
One 6-pin
None
SLI options
+
-
Boost clock speed
1033 MHz
1071 MHz
Core clock speed
980 MHz
1019 MHz
CUDA cores
960
-
Floating-point performance
1,981 gflops
1,371 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
2,540 million
3,000 million
Pipelines / CUDA cores
960
640
Power consumption (TDP)
140 Watt
60 Watt
Texture fill rate
78.4 billion/sec
42.84
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
2 GB
Memory bus width
192-bit GDDR5
128 Bit
Memory clock speed
6.0 GB/s
6000 MHz
Memory bandwidth
144.2 GB/s
96 GB/s
Display Connectors
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
Multi monitor support
4 displays
-
HDMI
+
+
HDCP
+
-
Maximum VGA resolution
2048x1536
-
Audio input for HDMI
Internal
-
DirectX
12 (11_0)
12 (12_0)
CUDA
+
-
OpenCL
1.2
2.0
OpenGL
4.3
4.6
Shader Model
5.1
6.4
Vulkan
1.1.126
1.2.131
3D Blu-Ray
+
-
3D Gaming
+
-
3D Vision
+
-