Radeon R9 390 X2 and GeForce GTX 1660 - video card comparison
Radeon R9 390 X2
GeForce GTX 1660
Architecture
GCN 2.0 (2013−2017)
Turing (2018−2021)
GPU code name
Grenada
Turing TU116
Market segment
Desktop
Desktop
Release date
September 2015
March 2019
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
4x 8-pin
1x 8-pin
Boost clock speed
-
1785 MHz
Core clock speed
1000 MHz
1530 MHz
Floating-point performance
2x 5,120 gflops
-
Manufacturing process technology
28 nm
12 nm
Number of transistors
6,200 million
6,600 million
Pipelines / CUDA cores
2560
1408
Power consumption (TDP)
580 Watt
120 Watt
Texture fill rate
160.0
157.1
Memory type
GDDR5
GDDR5
Maximum RAM amount
8 GB
6 GB
Memory bus width
512 Bit
192 Bit
Memory clock speed
5400 MHz
8000 MHz
Memory bandwidth
345.6 GB/s
192.1 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 (12_0)
12 (12_1)
CUDA
-
7.5
OpenCL
2.0
1.2
OpenGL
4.6
4.6
Shader Model
6.3
6.5
Vulkan
1.2.131
1.2.131