Radeon R9 M390X and Radeon RX 6400 - video card comparison
Passmark - benchmark score Radeon R9 M390X vs Radeon RX 6400
Radeon R9 M390X
3705
Radeon RX 6400
7776
Radeon R9 M390X
Radeon RX 6400
Architecture
GCN 3 (2014−2016)
RDNA 2.0 (2020−2022)
GPU code name
Amethyst (XT) / Tonga
Navi 24
Market segment
Laptop
Desktop
Release date
June 2015
January 2022
Bus support
PCIe 3.0
-
Interface
PCIe 3.0 x16
PCIe 4.0 x4
Supplementary power connectors
None
None
Boost clock speed
-
2321 MHz
Core clock speed
723 MHz
-
Floating-point performance
2,961 gflops
-
Manufacturing process technology
28 nm
6 nm
Number of transistors
5,000 million
5,400 million
Pipelines / CUDA cores
2048
768
Power consumption (TDP)
100 Watt
53 Watt
Texture fill rate
92.54
111.4
Memory type
GDDR5
GDDR6
Maximum RAM amount
4 GB
4 GB
Memory bus width
256 Bit
64 Bit
Memory clock speed
-
16 GB/s
Memory bandwidth
160.0 GB/s
128.0 GB/s
Shared memory
-
-
Display Connectors
No outputs
1x HDMI 2.1, 1x DisplayPort 1.4a
Eyefinity
1
-
HDMI
-
+
DirectX
DirectX® 12
12 Ultimate (12_2)
Mantle
+
-
OpenCL
Not Listed
2.2
OpenGL
4.4
4.6
Shader Model
6.3
6.6
Vulkan
+
1.3
AppAcceleration
-
-
DualGraphics
1
-
Enduro
-
-
FreeSync
1
-
HD3D
+
-
PowerTune
+
-
Switchable graphics
1
-
TrueAudio
-
-
ZeroCore
+
-