Autoselection of bootable device

[Sebastian42]

One of my PCs  has only one bootable device connected at startup time, and always boots from that device, no matter which out of four ones it is.
Another PC has 10 SATA ports which are all connected to devices, but only four of which are powered, and only one of which is bootable. It always requires me to reset boot order if I change the bootable device. Can that be tweaked so it autoselects the bootable device ? The BIOS is Award Software International 1/02/2011 SIMBIOS v 2.4