Radeon RX 6400 vs Radeon RX 455 OEM
We compared two Desktop platform GPUs: 4GB VRAM Radeon RX 6400 and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon RX 6400 Advantages
Released 5 years and 7 months late
Boost Clock2321MHz
More VRAM (4GB vs 2GB)
Larger VRAM bandwidth (128.0GB/s vs 104.0GB/s)
Lower TDP (53W vs 100W)
Score
Benchmark
FP32 (float)
Radeon RX 6400
+121%
3565
Radeon RX 455 OEM
1613
Graphics Card
Jan 2022
Release Date
Jun 2016
Navi II
Generation
Arctic 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
1625 MHz
Memory
4GB
Memory Size
2GB
GDDR6
Memory Type
GDDR5
64bit
Memory Bus
128bit
128.0GB/s
Bandwidth
104.0GB/s
Render Config
12
Compute Units
12
768
Shading Units
768
48
TMUs
48
32
ROPs
16
12
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
1024 KB
L2 Cache
256 KB
16 MB
L3 Cache
-
Theoretical Performance
74.27 GPixel/s
Pixel Rate
16.80 GPixel/s
111.4 GTexel/s
Texture Rate
50.40 GTexel/s
7.130 TFLOPS
FP16 (half)
-
3.565 TFLOPS
FP32 (float)
1.613 TFLOPS
222.8 GFLOPS
FP64 (double)
100.8 GFLOPS
Board Design
53W
TDP
100W
250 W
Suggested PSU
300 W
1x HDMI 2.1
1x DisplayPort 1.4a
1x DisplayPort 1.4a
Outputs
1x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x HDMI 1.4a
1x DisplayPort 1.2
None
Power Connectors
1x 6-pin
Graphics Processor
Navi 24
GPU Name
Tobago
Navi 24 XL
(215-135000046)
(215-135000046)
GPU Variant
Tobago PRO
(215-0875010)
(215-0875010)
RDNA 2.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
6 nm
Process Size
28 nm
5.4 billion
Transistors
2.08 billion
107 mm²
Die Size
160 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
