Question PC Wont boot without AIO power?

[KatakuriChan]

Hi, I have a 12600K, Gigabyte Z690 UD and NZXT X63 AIO. I just noticed the system isn't starting without connecting the SATA power to the AIO. But I barely remember booting without it when I first bench test the components. Can someone confirm this?

 

[geofelt]

A motherboard will not start unless it can detect that a cooler is installed.
That is usually done by detecting 500rpm on the cpu fan header

 

[Fix_that_Glitch]

Well I kind of had this happen to me, I put in a new pcie 5.0 psu, was in a hurry to test out my new rtx 4090. I used all new cables for the psu. But what I didn't realize is I forgot to change out the new cable for my aio, so it wasn't getting power and my pc would not boot. It took me an hour to figure what I did wrong. As soon as I got power with new cable to the aio the pc fired right up.