GeForce GTX 660 OEM and Radeon RX 580 2048SP - video card comparison
GeForce GTX 660 OEM
Radeon RX 580 2048SP
Architecture
Kepler (2012−2018)
GCN 4.0 (2016−2020)
GPU code name
GK104
Polaris 20
Market segment
Desktop
Desktop
Release date
August 2012
October 2018
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
1x 6-pin
1x 8-pin
Boost clock speed
888 MHz
1284 MHz
Core clock speed
823 MHz
1168 MHz
Floating-point performance
2,046 gflops
-
Manufacturing process technology
28 nm
14 nm
Number of transistors
3,540 million
5,700 million
Pipelines / CUDA cores
1152
2048
Power consumption (TDP)
130 Watt
150 Watt
Texture fill rate
85.25
164.4
Memory type
GDDR5
GDDR5
Maximum RAM amount
2 GB
8 GB
Memory bus width
256 Bit
256 Bit
Memory clock speed
5600 MHz
7000 MHz
Memory bandwidth
179.2 GB/s
224.0 GB/s
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 3x 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
1.2.131