https://forums.guru3d.com/threads/overdriventool-tool-for-amd-gpus.416116/
Just use that, only use wattman if you want to reset to default. Check with GPU-z the clocks are changing.
Values should retain through reebot, no need to apply them everytime.
But if you want, easiest way to add to windows autostart is to use registry:
Code:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
"OverdriveNTool"="\"C:\\Program Files (x86)\\OverdriveNTool\\OverdriveNTool.exe\" -p0\"1\""
Replace C:\\Program Files (x86)\\OverdriveNTool to directory where you have OverdriveNTool.exe, save this to autostart.reg file, then run this file once.
Remember to use only ASCII letters and numbers for profile name that you want to use in commandline, and use \ before each \ and " characters, so
"OverdriveNTool"=""C:\Program Files (x86)\OverdriveNTool\OverdriveNTool.exe" -p0"profile name""
should be replaced to
"OverdriveNTool"="\"C:\\Program Files (x86)\\OverdriveNTool\\OverdriveNTool.exe\" -p0\"profile name\""
This is the reply I got when I asked how to set it on reboot. The advantage of the tool is that its has profiles so applying a profile is quick.