Another solution to reduce noise at the under voltage as you are in this video would be getting the 3000 cfm Noctua fans which are quiet noise reduction fans
Hey, Braiins shows a range between 100W and 5000W When you run an S9 Antminer at 200W, will the Fans be much more quiet? (I know that the hashrate will be really low then)
Even though that's the range they provide, the machine will not be able to function at the high or low end. On the high end, it will be limited by the PSU's max power rating. On the low end, it depends on what the chips can handle. The lower the power consumption, the cooler the chips will be and the less noise the fans will make. Maybe a good spot to start is 850W and see how that goes.
At minute 4:12, you see the screen with 85 degrees on the chips, it's a brutally high temperature. This is how the miner is slowly dying. The fans are working at 50%. Normal for 13.5 terahases is 5200 RPM, and a temperature of 75 degrees. It is no achievement to reduce the noise, reducing to 2200 RPM. Caution for you minner ¡¡
We do not but there are some great repair centers in the US. ASIC Masters in Chicago is great. HMTech in North Carolina is great for Whatsminer. Great Voyage is great in New Hampshire for Bitmain repairs
