I beg to differ, we have other newer 580’s that do not pulse up and down and that $16k enterprise grade VSAT modem above it doesn’t do it! The VSAT comes on with full fan speed at startup as a test then drops back. Only time the VSAT fans would speed up is if the temperature climbed but that locker has A/C. The 580 is not a “cheap” 1U device so it sure seems reasonable for Peplink to get the fan throttling correct. Raw full speed fan noise I can understand (though not accept), but that is not the issue. There is clearly some temperature based fan throttling going on, it just isn’t done correctly. And it is in the captains office of $30,000,000 superyacht, not a small home office. Lot’s of other 1U equipment onboard and nothing else acts like this!