Quote from: philipma1957 on January 13, 2021, 01:49:04 AM

A lot depends on what speeds you are doing the unit at.

Here is a 1 board build with a lessor fan.

this fan is good.

https://www.ebay.com/itm/Delta-AFB1212SHE-PWM-120mm-x-38mm-4pin-PWM-FAN-Extreme-Hi-speed-3700-RPM-151CFM/143654747353?

since you use 1 fan it saves power

the single fan is low speed about 1740

set to 400 mhz and 8.1 volts

I have had the pulsing issue you mention set on auto.

So I always do manual speed as these are my ck.pool lottery tickets.

Nothing happens while i have internet. All perfectly good and working with 40% Fan, 550 mhz and 8.5 volts.
Loosing internet makes this behavior.

Let me fill the details.

If you have S9---->Router cable and you disconnect the cable, S9 behaves correctly, keeps at 40% (detects no cable detected)
If you have S9---->SWITCH------->Router and you disconnect the SWITCH----->Router cable, after 5 minutes the unit goes crazy.

I believe this is a bug, that's why i'm reporting it.