NVIDIA RTX A4000H vs AMD Radeon Instinct MI355X
GPU · Specs Compare
Graphics Card
Release Date
Apr 2021
Jun 2025
Generation
Quadro Ampere
Radeon Instinct
Type
Desktop
Professional
Bus Interface
PCIe 4.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
735 MHz
1000 MHz
Boost Clock
1560 MHz
2400 MHz
Memory Clock
1750 MHz
2000 MHz
Memory
Memory Size
16GB
288GB
Memory Type
GDDR6
HBM3e
Memory Bus
256bit
8192bit
Bandwidth
448.0GB/s
8.19TB/s
Render Config
SM Count
48
—
Shading Units
6144
16384
TMUs
192
1024
ROPs
96
0
Tensor Cores
192
1216
RT Cores
48
—
L1 Cache
128 KB (per SM)
32 KB (per CU)
L2 Cache
4 MB
32 MB
Compute Units
—
256
L3 Cache
—
256 MB
Theoretical Performance
Pixel Rate
149.8 GPixel/s
0 MPixel/s
Texture Rate
299.5 GTexel/s
2457.6 GTexel/s
FP16 (half)
19.17 TFLOPS
78.64 TFLOPS
FP32 (float)
19.17 TFLOPS
78.64 TFLOPS
FP64 (double)
299.5 GFLOPS
39.32 TFLOPS
Graphics Processor
GPU Name
GA104
MI350 256CU
GPU Variant
GA104-???-A1
—
Architecture
Ampere
CDNA 4.0
Foundry
Samsung
TSMC
Process Size
8 nm
3 nm
Transistors
17.4 billion
185 billion
Die Size
392 mm²
Unknown
Board Design
TDP
140W
1400W
Suggested PSU
300 W
1800 W
Outputs
4x DisplayPort 1.4a
No outputs
Power Connectors
1x 6-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.