Just built a Z590 system and it gives me this weird series of higher pitch beeps every time it boots up. Please note that these are not the POST beep codes. The beeping I am talking about occur before the POST beep codes, are a different tone, and are too rapid for me to count. The manual states that "Many motherboards will beep 1-2 times per USB device plugged in at boot; some will beep more based on functions of the device." 
 
So my question is: does anyone else's Z590 Dark beep like this or is mine just one of the "many?"
 
Thanks in advance!

That's usually just the USB devices beeps. It beeps for every USB device plugged in. This can be turned off in the BIOS too.