NVIDIA B200 vs AMD Radeon Instinct MI355X
GPU Specs Compare
Graphics Card
Release Date
Jan 2024
Jun 2025
Generation
Server Blackwell
Radeon Instinct
Type
Desktop
Professional
Bus Interface
PCIe 5.0 x16
PCIe 5.0 x16
Clock Speeds
Base Clock
700 MHz
1000 MHz
Boost Clock
1965 MHz
2400 MHz
Memory Clock
2000 MHz
2000 MHz
Memory
Memory Size
90GB
288GB
Memory Type
HBM3e
HBM3e
Memory Bus
4096bit
8192bit
Bandwidth
4.10TB/s
8.19TB/s
Render Config
SM Count
148
-
Shading Units
18944
16384
TMUs
592
1024
ROPs
24
0
Tensor Cores
592
1216
L1 Cache
256 KB (per SM)
32 KB (per CU)
L2 Cache
50 MB
32 MB
Compute Units
-
256
L3 Cache
-
256 MB
Theoretical Performance
Pixel Rate
47.16 GPixel/s
0 MPixel/s
Texture Rate
1163.3 GTexel/s
2457.6 GTexel/s
FP16 (half)
1191.2 TFLOPS
78.64 TFLOPS
FP32 (float)
74.45 TFLOPS
78.64 TFLOPS
FP64 (double)
37.22 TFLOPS
39.32 TFLOPS
Graphics Processor
GPU Name
GB100
MI350 256CU
Architecture
Blackwell
CDNA 4.0
Foundry
TSMC
TSMC
Process Size
5 nm
3 nm
Transistors
104 billion
185 billion
Die Size
Unknown
Unknown
Board Design
TDP
1000W
1400W
Suggested PSU
1400 W
1800 W
Outputs
No outputs
No outputs
Power Connectors
-
None
Graphics Features
DirectX
N/A
N/A
OpenGL
N/A
N/A
OpenCL
3.0
3.0
Vulkan
N/A
N/A
CUDA
10.0
-
Shader Model
N/A
N/A