You need Ebang Ebit miner management, unfortunately, Ebang removed all URL extensions to their tools and manuals, I found an archive page on the waybackmachine for the manuals here >
https://web.archive.org/web/20210618211550/http://miner.ebang.com.cn/article-19.htmlAlso someone on this forum uploaded the tool, here is the post
here link to EMM:
farstyle.net/soft/EbitMinerMiniV1.0.3.5EN.zip
Also you can use MyFarm x100, it can be downloaded in telegram chanel:
https://t.me/myfarm_updates
Download it at your own risk!!
Ebang tool will let you change the miner's frequency which is what you need for overclocking/underclocking.
Ebang made the shitiest gears on the planet, hope you can work it out.