Radeon RX 6400 vs Radeon R9 390
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 8GB VRAM Radeon R9 390 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 's Advantages
Released 6 years and 7 months late
Boost Clock2321MHz
Lower TDP (53W vs 275W)
Radeon R9 390 's Advantages
More VRAM (8GB vs 4GB)
Larger VRAM bandwidth (384.0GB/s vs 128.0GB/s)
1792 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon RX 6400
3565
Radeon R9 390
+43%
5120
3DMark Time Spy
Radeon RX 6400
3585
Radeon R9 390
+10%
3964
3DMark Time Spy Extreme
Radeon RX 6400
1662
Radeon R9 390
+16%
1931
Graphics Card
Jan 2022
Release Date
Jun 2015
Navi II
Generation
Pirate Islands
Desktop
Type
Desktop
PCIe 4.0 x4
Bus Interface
PCIe 3.0 x16
Clock Speeds
1923 MHz
Base Clock
-
2321 MHz
Boost Clock
-
2000 MHz
Memory Clock
1500 MHz
Memory
4GB
Memory Size
8GB
GDDR6
Memory Type
GDDR5
64bit
Memory Bus
512bit
128.0GB/s
Bandwidth
384.0GB/s
Render Config
12
Compute Units
40
768
Shading Units
2560
48
TMUs
160
32
ROPs
64
12
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
1024 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
64.00 GPixel/s
111.4 GTexel/s
Texture Rate
160.0 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
5.120 TFLOPS
222.8 GFLOPS
FP64 (double)
640.0 GFLOPS
Board Design
53W
TDP
275W
250 W
Suggested PSU
600 W
1x HDMI 2.1
1x DisplayPort 1.4a
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
None
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
Navi 24
GPU Name
Grenada
Navi 24 XL
(215-135000046)
GPU Variant
Grenada PRO
(215-0880030)
RDNA 2.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
6 nm
Process Size
28 nm
5.4 billion
Transistors
6.2 billion
107 mm²
Die Size
438 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.2
OpenCL
2.0
1.3
Vulkan
1.2
6.7
Shader Model
6.3
