Here the product support page for the
GA-7ZMMH motherboard
Here is the
GA-7ZMMH Manual
Ok, on page 44 of your manual gives instructions for entering BIOS Setup
<copied from manual>
ENTERING SETUP
Power ON the computer and press <Del> immediately will allow you to enter Setup. If
unsuccessful, you can restart the system and try again by pressing the "RESET" bottom on the
system case. You may also restart by simultaneously pressing <Ctrl> − <Alt>− <Del> keys.