Repository: stable-diffusion-webui
Issue: [Bug]: RuntimeError: Couldn't install xformers.
Labels: bug-report

### Is there an existing issue for this?

- [X] I have searched the existing issues and checked the recent builds/commits

### What happened?

CPU：Intel(R) Xeon(R) CPU E5-2680 v2*2
GPU：NVIDIA Tesla P40
RAM：128GB
System：Windows 10 22H2
I want to use xformers.The error occurred when I started 'webui-user.bat'.

### Steps to reproduce the problem

Double-click 'webui-user.bat'

### What should have happened?

I want to use xformers,when I delet '--xformers --reinstall-xformers ',the bat can be opened stable-diffusion-webui.
But it will remind:No module 'xformers'. Proceeding without it. 

### Commit where the problem happens

webui-user.bat

### What platforms do you use to access the UI ?

Windows

### What browsers do you use to access the UI ?

Google Chrome

### Command Line Arguments

```Shell
@echo off

set PYTHON=
set GIT=
set VENV_DIR=
set COMMANDLINE_ARGS= --xformers --reinstall-xformers --force-enable-xformers --api
git pull
call webui.bat
```


### List of extensions

no

### Console logs

```Shell
Already up to date.
venv "C:\Users\LHJ-P40\Documents\stable-diffusion-webui\venv\Scripts\Python.exe"
Python 3.10.6 (tags/v3.10.6:9c7b4bd, Aug  1 2022, 21:53:49) [MSC v.1932 64 bit (AMD64)]
Commit hash: 22bcc7be428c94e9408f589966c2040187245d81
Installing xformers
Traceback (most recent call last):
  File "C:\Users\LHJ-P40\Documents\stable-diffusion-webui\launch.py", line 355, in <module>
    prepare_environment()
  File "C:\Users\LHJ-P40\Documents\stable-diffusion-webui\launch.py", line 274, in prepare_environment
    run_pip(f"install -U -I --no-deps {xformers_package}", "xformers")
  File "C:\Users\LHJ-P40\Documents\stable-diffusion-webui\launch.py", line 129, in run_pip
    return run(f'"{python}" -m pip {args} --prefer-binary{index_url_line}', desc=f"Installing {desc}", errdesc=f"Couldn't install {desc}")
  File "C:\Users\LHJ-P40\Documents\stable-diffusion-webui\launch.py", line 97, in run
    raise RuntimeError(message)
RuntimeError: Couldn't install xformers.
Command: "C:\Users\LHJ-P40\Documents\stable-diffusion-webui\venv\Scripts\python.exe" -m pip install -U -I --no-deps xformers==0.0.16rc425 --prefer-binary
Error code: 1
stdout: <empty>
stderr: WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ReadTimeoutError("HTTPSConnectionPool(host='pypi.org', port=443): Read timed out. (read timeout=15)")': /simple/xformers/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'Զǿȹرһеӡ', None, 10054, None))': /simple/xformers/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'Զǿȹرһеӡ', None, 10054, None))': /simple/xformers/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'Զǿȹرһеӡ', None, 10054, None))': /simple/xformers/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ProtocolError('Connection aborted.', ConnectionResetError(10054, 'Զǿȹرһеӡ', None, 10054, None))': /simple/xformers/
ERROR: Could not find a version that satisfies the requirement xformers==0.0.16rc425 (from versions: none)
ERROR: No matching distribution found for xformers==0.0.16rc425


Please press any key to continue. . .
```


### Additional information

_No response_