AMD Radeon Instinct MI455X vs NVIDIA RTX A5000 Max-Q
GPU · Specs Compare
Graphics Card
Release Date
Jul 2026
Apr 2021
Generation
Radeon Instinct
Quadro Ampere-M
Type
Desktop
Mobile
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1000 MHz
720 MHz
Boost Clock
2400 MHz
1350 MHz
Memory Clock
1900 MHz
1500 MHz
Memory
Memory Size
432GB
16GB
Memory Type
HBM4
GDDR6
Memory Bus
24576bit
256bit
Bandwidth
23.3TB/s
384.0GB/s
Render Config
Compute Units
256
—
Shading Units
32768
6144
TMUs
1024
192
ROPs
0
96
L1 Cache
32 KB (per CU)
128 KB (per SM)
L2 Cache
192 MB
4 MB
SM Count
—
48
Tensor Cores
—
192
RT Cores
—
48
Theoretical Performance
Pixel Rate
0 MPixel/s
129.6 GPixel/s
Texture Rate
2457.6 GTexel/s
259.2 GTexel/s
FP16 (half)
157.3 TFLOPS
16.59 TFLOPS
FP32 (float)
157.3 TFLOPS
16.59 TFLOPS
FP64 (double)
2.458 TFLOPS
259.2 GFLOPS
Graphics Processor
GPU Name
MI450 256CU
GA104
Architecture
CDNA 5.0
Ampere
Foundry
TSMC
Samsung
Process Size
2 nm
8 nm
Transistors
320 billion
17.4 billion
Die Size
Unknown
392 mm²
Board Design
TDP
2300W
80W
Suggested PSU
2700 W
—
Outputs
No outputs
Portable Device Dependent
Power Connectors
None
None
Graphics Features
DirectX
N/A
12 Ultimate (12_2)
OpenGL
N/A
4.6
OpenCL
3.0
3.0
Vulkan
N/A
1.3
Shader Model
N/A
6.7
CUDA
—
8.6
▲ Specs Compare
Data sourced from official specifications and benchmark tests.