AMD Radeon Instinct MI455X vs NVIDIA H100 SXM5 64 GB
GPU Specs Compare
Graphics Card
Release Date
Jul 2026
Mar 2023
Generation
Radeon Instinct
Tesla Hopper
Type
Desktop
AI GPU
Bus Interface
PCIe 6.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
1000 MHz
1665 MHz
Boost Clock
2400 MHz
1980 MHz
Memory Clock
1900 MHz
1313 MHz
Memory
Memory Size
432GB
64GB
Memory Type
HBM4
HBM3
Memory Bus
24576bit
3072bit
Bandwidth
23.3TB/s
2.02TB/s
Render Config
Compute Units
256
-
Shading Units
32768
16896
TMUs
1024
528
ROPs
0
24
L1 Cache
32 KB (per CU)
256 KB (per SM)
L2 Cache
192 MB
30 MB
SM Count
-
132
Tensor Cores
-
528
Theoretical Performance
Pixel Rate
0 MPixel/s
47.52 GPixel/s
Texture Rate
2457.6 GTexel/s
1045 GTexel/s
FP16 (half)
157.3 TFLOPS
267.6 TFLOPS
FP32 (float)
157.3 TFLOPS
66.91 TFLOPS
FP64 (double)
2.458 TFLOPS
33.45 TFLOPS
Graphics Processor
GPU Name
MI450 256CU
GH100
Architecture
CDNA 5.0
Hopper
Foundry
TSMC
TSMC
Process Size
2 nm
5 nm
Transistors
320 billion
80 billion
Die Size
Unknown
814 mm²
Board Design
TDP
2300W
700W
Suggested PSU
2700 W
1100 W
Outputs
No outputs
No outputs
Power Connectors
None
8-pin EPS
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
CUDA
-
9.0