Fans ramping up randomly

[Mike_J_Smith]

I've got 10 fans controlled by Aquasuite, all of them run off one fan output of the Aquacomputer D5 pump via a powered splitter.

Everything has worked flawlessly for months, but all of a sudden I'm getting very short, sharp increases in fan output. Aquasuite is tied to water temperature, so that's not peaking and Aquasuite still says it is only putting out the minimum % I set.

So it's not the software, then I guess it's hardware issue? Maybe one of the fans has gone faulty or perhaps more likely it's a wiring issue and somethng has come loose.

Before I dive in and start looking at the wiring, is there anythign else I may have missed?

 

[Mike_J_Smith]

Also to add, this predominantly happens on start-up. For maybe 10-15 minutes, maybe longer. After that it seems to stop happening.

 

[Mike_J_Smith]

It's a watercooled loop and the source is the water temperature, so that shouldn't be it. Although the only other fan is the chipset fan, so maybe it's that? It can get quite loud and I had a problem a while ago with it running at full pelt. I can't remember the details but it was a common issue with the board (MSI X570 Tomahawk).


I've taken the side window off the PC to see if I can identifiy if it's all fans, some fans or the chipset.

 

[Mike_J_Smith]

Yeah maybe it's the chipset. Of course now I'm sat next to the computer with the side off, nothing is happening! The chipset fan is diffcult to see as I have a vertical mount GPU, but the next time it happens I can take a look to see if that is spinning up. It's normally at 0% so it's not something I've thought about since I did that fix.

 

[Mike_J_Smith]

I took the side panels off and found the offending item; a fan suffering from my poor recabling attempts . Disconnected it from the hub and all nice and quiet again now