NVIDIA B300 SXM6 AC vs AMD Radeon Instinct MI250
GPU Specs Compare
Graphics Card
Release Date
Sep 2025
Nov 2021
Generation
Server Blackwell
Radeon Instinct
Type
Desktop
Professional
Bus Interface
PCIe 6.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1665 MHz
1000 MHz
Boost Clock
2032 MHz
1700 MHz
Memory Clock
2000 MHz
1600 MHz
Memory
Memory Size
288GB
128GB
Memory Type
HBM3e
HBM2e
Memory Bus
8192bit
8192bit
Bandwidth
8.19TB/s
3277GB/s
Render Config
SM Count
148
-
Shading Units
18944
13312
TMUs
592
832
ROPs
24
0
Tensor Cores
592
-
L1 Cache
256 KB (per SM)
16 KB (per CU)
L2 Cache
126 MB
16 MB
Compute Units
-
208
Theoretical Performance
Pixel Rate
48.77 GPixel/s
0 MPixel/s
Texture Rate
1202.9 GTexel/s
1414 GTexel/s
FP16 (half)
76.99 TFLOPS
362.1 TFLOPS
FP32 (float)
76.99 TFLOPS
45.26 TFLOPS
FP64 (double)
1202.9 GFLOPS
45.26 TFLOPS
Graphics Processor
GPU Name
GB110
Aldebaran
Architecture
Blackwell Ultra
CDNA 2.0
Foundry
TSMC
TSMC
Process Size
5 nm
6 nm
Transistors
208 billion
58.2 billion
Die Size
1628 mm²
Unknown
GPU Variant
-
Aldebaran
Board Design
TDP
1100W
500W
Suggested PSU
1500 W
900 W
Outputs
No outputs
No outputs
Power Connectors
-
2x 8-pin
Graphics Features
DirectX
N/A
N/A
OpenGL
N/A
N/A
OpenCL
3.0
3.0
Vulkan
N/A
N/A
CUDA
10.3
-
Shader Model
N/A
N/A