Radeon RX 6900 XT and Radeon R9 390 X2 - video card comparison
Radeon RX 6900 XT
Radeon R9 390 X2
Architecture
Navi / RDNA2 (2020−2022)
GCN 2.0 (2013−2017)
GPU code name
Navi 21
Grenada
Market segment
Desktop
Desktop
Release date
December 2020
September 2015
Interface
PCIe 4.0 x16
PCIe 3.0 x16
Supplementary power connectors
2x 8-pin
4x 8-pin
Boost clock speed
2250 MHz
-
Core clock speed
1825 MHz
1000 MHz
Floating-point performance
-
2x 5,120 gflops
Manufacturing process technology
7 nm
28 nm
Number of transistors
26,800 million
6,200 million
Pipelines / CUDA cores
5120
2560
Power consumption (TDP)
300 Watt
580 Watt
Texture fill rate
720.0
160.0
Memory type
GDDR6
GDDR5
Maximum RAM amount
16 GB
8 GB
Memory bus width
256 Bit
512 Bit
Memory clock speed
16000 MHz
5400 MHz
Memory bandwidth
512.0 GB/s
345.6 GB/s
Shared memory
-
-
Display Connectors
1x HDMI, 2x DisplayPort, 1x USB Type-C
2x DVI, 1x HDMI, 1x DisplayPort
HDMI
+
+
DirectX
12 Ultimate (12_2)
12 (12_0)
OpenCL
2.1
2.0
OpenGL
4.6
4.6
Shader Model
6.5
6.3
Vulkan
1.2
1.2.131