Radeon R9 390 X2 and Radeon RX Vega 64 - video card comparison
Radeon R9 390 X2
Radeon RX Vega 64
Architecture
GCN 2.0 (2013−2017)
Vega (2017−2021)
GPU code name
Grenada
Vega
Market segment
Desktop
Desktop
Release date
September 2015
August 2017
Interface
PCIe 3.0 x16
PCIe 3.0 x16
Supplementary power connectors
4x 8-pin
2x 8-pin
Boost clock speed
-
1546 MHz
Core clock speed
1000 MHz
1630 MHz
Floating-point performance
2x 5,120 gflops
13,353 gflops
Manufacturing process technology
28 nm
14 nm
Number of transistors
6,200 million
12,500 million
Pipelines / CUDA cores
2560
4096
Power consumption (TDP)
580 Watt
295 Watt
Texture fill rate
160.0
395.8
Memory type
GDDR5
HBM2
Maximum RAM amount
8 GB
8 GB
Memory bus width
512 Bit
2048 Bit
Memory clock speed
5400 MHz
945 MHz
Memory bandwidth
345.6 GB/s
483.8 GB/s
Shared memory
-
-
Display Connectors
2x DVI, 1x HDMI, 1x DisplayPort
1x HDMI, 3x DisplayPort
HDMI
+
+
DirectX
12 (12_0)
12 (12_1)
OpenCL
2.0
2.0
OpenGL
4.6
4.6
Shader Model
6.3
6.4
Vulkan
1.2.131
1.1.125