I recently purchased a new be quiet! Silent Base 802 case, but can't figure out exactly what these switches on the top/front panel on the left side do. I looked on their site and in the manual, but can't seem to find it. So not sure if 1, 2, 3 or auto is the best choice (since I'm unclear on their function). But I believe 1 is the default setting, as I haven't changed it.
![h5LFB71.jpeg](https://i.imgur.com/h5LFB71.jpeg)