One of the devices beep every 8 minutes, another device beep every 10 minutes, and a third device beep ever

One of the devices beep every 8 minutes, another device beep every 10 minutes, and a third device beep ever

Wake up and stop hitting the snooze fishing rod
What devices?
Are these devices attached to your computer by USB cable, or you referring to parts of your computer?
i'm sorry, is this a riddle?



Then the third device beeps every 20 minutes. And your numbers are contained by base16 (hex). :)