AMD Radeon Instinct MI455X vs AMD Radeon Instinct MI308X
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Dec 2023
Generation
Radeon Instinct
Radeon Instinct
Type
Desktop
Professional
Bus Interface
PCIe 6.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
1000 MHz
1000 MHz
Boost Clock
2400 MHz
2100 MHz
Memory Clock
1900 MHz
1300 MHz
Memory
Memory Size
432GB
192GB
Memory Type
HBM4
HBM3
Memory Bus
24576bit
8192bit
Bandwidth
23.3TB/s
5.32TB/s
Render Config
Compute Units
256
304
Shading Units
32768
19456
TMUs
1024
1216
ROPs
0
0
L1 Cache
32 KB (per CU)
16 KB (per CU)
L2 Cache
192 MB
16 MB
Tensor Cores
-
1216
L3 Cache
-
256 MB
Theoretical Performance
Pixel Rate
0 MPixel/s
0 MPixel/s
Texture Rate
2457.6 GTexel/s
2553.6 GTexel/s
FP16 (half)
157.3 TFLOPS
81.72 TFLOPS
FP32 (float)
157.3 TFLOPS
81.72 TFLOPS
FP64 (double)
2.458 TFLOPS
40.86 TFLOPS
Graphics Processor
GPU Name
MI450 256CU
Aqua Vanjaram
Architecture
CDNA 5.0
CDNA 3.0
Foundry
TSMC
TSMC
Process Size
2 nm
5 nm
Transistors
320 billion
153 billion
Die Size
Unknown
1017 mm²
Board Design
TDP
2300W
750W
Suggested PSU
2700 W
1150 W
Outputs
No outputs
No outputs
Power Connectors
None
None
Graphics Features
DirectX
N/A
N/A
OpenGL
N/A
N/A
OpenCL
3.0
3.0
Vulkan
N/A
N/A
Shader Model
N/A
N/A