NVIDIA A800 SXM4 80 GB vs AMD Radeon Instinct MI455X
GPU Specs Compare
Graphics Card
Release Date
Aug 2022
Jul 2026
Generation
Ampere
Radeon Instinct
Type
AI GPU
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
1155 MHz
1000 MHz
Boost Clock
1410 MHz
2400 MHz
Memory Clock
1593 MHz
1900 MHz
Memory
Memory Size
80GB
432GB
Memory Type
HBM2e
HBM4
Memory Bus
5120bit
24576bit
Bandwidth
2039GB/s
23.3TB/s
Render Config
SM Count
108
-
Shading Units
6912
32768
TMUs
432
1024
ROPs
160
0
Tensor Cores
432
-
L1 Cache
192 KB (per SM)
32 KB (per CU)
L2 Cache
40 MB
192 MB
Compute Units
-
256
Theoretical Performance
Pixel Rate
225.6 GPixel/s
0 MPixel/s
Texture Rate
609.1 GTexel/s
2457.6 GTexel/s
FP16 (half)
77.97 TFLOPS
157.3 TFLOPS
FP32 (float)
19.49 TFLOPS
157.3 TFLOPS
FP64 (double)
9.746 TFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
GA100
MI450 256CU
Architecture
Ampere
CDNA 5.0
Foundry
TSMC
TSMC
Process Size
7 nm
2 nm
Transistors
54.2 billion
320 billion
Die Size
826 mm²
Unknown
Board Design
TDP
400W
2300W
Suggested PSU
800 W
2700 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
CUDA
8.0
-
Shader Model
N/A
N/A