GeForce RTX 3060 Laptop GPU with CUDA capability sm_86 is not compatible with the current PyTorch in

1、问题

运行pytorch程序时报错:

GeForce RTX 3060 Laptop GPU with CUDA capability sm_86 is not compatible with the current PyTorch installation.
The current PyTorch install supports CUDA capabilities sm_37 sm_50 sm_60 sm_61 sm_70 sm_75 compute_37.
If you want to use the GeForce RTX 3060 Laptop GPU GPU with PyTorch, please check the instructions at https://pytorch.org/get-started/locally/

  warnings.warn(incompatible_device_warn.format(device_name, capability, " ".join(arch_list), device_name))

2、原因

这是个巨坑，30系显卡暂时不支持CUDA11以下版本，CUDA不支持当前显卡的算力。

• 查看显卡算力

• CUDA支持的显卡算力
  

从中可以看到这句话：a cubin generated for compute capability 7.0 is supported to run on a GPU with compute capability 7.5, however a cubin generated for compute capability 7.5 is not supported to run on a GPU with compute capability 7.0, and a cubin generated with compute capability 7.x is not supported to run on a GPU with compute capability 8.x
差不多意思就是：
（1）算力为7.0的cuda支持在算力为7.5上运行
（2）算力为7.5的cuda不支持在算力为7.0上运行
（3）算力为7.x的cuda不支持在算力为8.x上运行
我们前面已经发现30系显卡算力全部在8.x。而在文档中可以发现cuda10版本支持最高算力是7.x，因此不支持30系显卡。

3、解决

重新下载安装适配的CUDA11以上的版本，重新下载安装对应的pytorch。