AMD Radeon Instinct MI8 vs NVIDIA B300 SXM6 AC
GPU · Specs Compare
Graphics Card
Release Date
Dec 2016
Sep 2025
Generation
Radeon Instinct
Server Blackwell
Type
Professional
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 6.0 x16
Clock Speeds
Memory Clock
500 MHz
2000 MHz
Base Clock
—
1665 MHz
Boost Clock
—
2032 MHz
Memory
Memory Size
4GB
288GB
Memory Type
HBM
HBM3e
Memory Bus
4096bit
8192bit
Bandwidth
512.0GB/s
8.19TB/s
Render Config
Compute Units
64
—
Shading Units
4096
18944
TMUs
256
592
ROPs
64
24
L1 Cache
16 KB (per CU)
256 KB (per SM)
L2 Cache
2 MB
126 MB
SM Count
—
148
Tensor Cores
—
592
Theoretical Performance
Pixel Rate
64.00 GPixel/s
48.77 GPixel/s
Texture Rate
256.0 GTexel/s
1202.9 GTexel/s
FP16 (half)
8.192 TFLOPS
76.99 TFLOPS
FP32 (float)
8.192 TFLOPS
76.99 TFLOPS
FP64 (double)
512.0 GFLOPS
1202.9 GFLOPS
Graphics Processor
GPU Name
Fiji
GB110
GPU Variant
Fiji XT CA(215-0862120)
—
Architecture
GCN 3.0
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
28 nm
5 nm
Transistors
8.9 billion
208 billion
Die Size
596 mm²
1628 mm²
Board Design
TDP
175W
1100W
Suggested PSU
450 W
1500 W
Outputs
No outputs
No outputs
Power Connectors
1x 8-pin
—
Graphics Features
DirectX
12 (12_0)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.2.170
N/A
Shader Model
6.5
N/A
CUDA
—
10.3
▲ Specs Compare
Data sourced from official specifications and benchmark tests.