It seems you can't bold people's names when you mention them.
i guess that would slow the fan down a little. Probably not good for the cable either. Always edge cases, its not a common answer. its likely it was slowing fan enough for it to not do its job, but its back to normal now?
I have a spare Noctua fan now but its 120mm and all of my case fans are 140mm, i bought it for my last PC but never really needed it, I found another answer for it- reduce fan speeds. I don't think i need to replace fans yet, my PC so quiet that I started to hear other noises that may have always been there - its a new PC, I thought every unknown noise was PC out of concern. It doesn't help my PC sits between me and my window. That and rear of case faces me so I get echoes of noises that might not be so bad. My case fans aren't silent but they probably need a clean.
I don't hear any spikes in my PC, the only way I can tell my pc is playing a game is I can hear the GPU fan as it starts running at 70C, I can only ever hear the AIO fans if I change their fan curve or if ambient temps are over 30c (Summer) as the liquid is always going to be about 9c over ambient, so it can't go below that, and the plan starts to run the fans above 1k rpm, then I can hear them over the case fans. I changed the AIO fan plan to 0 rpm a few weeks ago and realised I couldn't tell any difference, meaning they are quieter than the case fans even when they are on.
If I run anything that will stress CPU, I normally swap the fan plan on aio so that the fans run faster to combat the change. That is mainly if i run a benchmark, they only things that make it really hot. Antivirus scans do too but they so fast I just let them run (system scans on my last pc would take 2 hours, now they 20 minutes).