NVIDIA B300 vs AMD Zhongshan Subor Z+ GPU
GPU Specs Compare
Graphics Card
Release Date
Sep 2025
Aug 2018
Generation
Server Blackwell
Console GPU
Type
Desktop
Game console
Bus Interface
PCIe 5.0 x16
-
Clock Speeds
Base Clock
1665 MHz
-
Boost Clock
2032 MHz
-
Memory Clock
2000 MHz
1200 MHz
Memory
Memory Size
144GB
8GB
Memory Type
HBM3e
GDDR5
Memory Bus
4096bit
256bit
Bandwidth
4.10TB/s
153.6GB/s
Render Config
SM Count
148
-
Shading Units
18944
1536
TMUs
592
96
ROPs
24
32
Tensor Cores
592
-
L1 Cache
256 KB (per SM)
-
L2 Cache
50 MB
-
Compute Units
-
24
Theoretical Performance
Pixel Rate
48.77 GPixel/s
41.60 GPixel/s
Texture Rate
1202.9 GTexel/s
124.8 GTexel/s
FP16 (half)
1231.8 TFLOPS
7.987 TFLOPS
FP32 (float)
76.99 TFLOPS
3.994 TFLOPS
FP64 (double)
1202.9 GFLOPS
249.6 GFLOPS
Graphics Processor
GPU Name
GB110
Fenghuang
Architecture
Blackwell Ultra
GCN 5.0
Foundry
TSMC
TSMC
Process Size
5 nm
14 nm
Transistors
104 billion
Unknown
Die Size
Unknown
397 mm²
GPU Variant
-
Zhongshan Subor
Board Design
TDP
1400W
100W
Suggested PSU
1800 W
-
Outputs
No outputs
No outputs
Graphics Features
DirectX
N/A
12 (12_1)
OpenGL
N/A
4.6
OpenCL
3.0
2.1
Vulkan
N/A
1.2
CUDA
10.3
-
Shader Model
N/A
6.2