NVIDIA RTX A5000-12Q vs AMD Radeon Instinct MI455X
GPU · Specs Compare
Graphics Card
Release Date
Apr 2021
Jul 2026
Generation
Quadro Ampere
Radeon Instinct
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
1170 MHz
1000 MHz
Boost Clock
1695 MHz
2400 MHz
Memory Clock
2000 MHz
1900 MHz
Memory
Memory Size
12GB
432GB
Memory Type
GDDR6
HBM4
Memory Bus
384bit
24576bit
Bandwidth
768.0GB/s
23.3TB/s
Render Config
SM Count
64
—
Shading Units
8192
32768
TMUs
256
1024
ROPs
96
0
Tensor Cores
256
—
RT Cores
64
—
L1 Cache
128 KB (per SM)
32 KB (per CU)
L2 Cache
6 MB
192 MB
Compute Units
—
256
Theoretical Performance
Pixel Rate
162.7 GPixel/s
0 MPixel/s
Texture Rate
433.9 GTexel/s
2457.6 GTexel/s
FP16 (half)
27.77 TFLOPS
157.3 TFLOPS
FP32 (float)
27.77 TFLOPS
157.3 TFLOPS
FP64 (double)
433.9 GFLOPS
2.458 TFLOPS
Graphics Processor
GPU Name
GA102
MI450 256CU
Architecture
Ampere
CDNA 5.0
Foundry
Samsung
TSMC
Process Size
8 nm
2 nm
Transistors
28.3 billion
320 billion
Die Size
628 mm²
Unknown
Board Design
TDP
230W
2300W
Suggested PSU
550 W
2700 W
Outputs
4x DisplayPort 1.4a
No outputs
Power Connectors
1x 8-pin
None
Graphics Features
DirectX
12 Ultimate (12_2)
N/A
OpenGL
4.6
N/A
OpenCL
3.0
3.0
Vulkan
1.3
N/A
CUDA
8.6
—
Shader Model
6.7
N/A
▲ Specs Compare
Data sourced from official specifications and benchmark tests.