|"phoenix awardbios v6.00pg"|
I believe that's an older bios version, and that's probably not what
"Product: Micro-star international Motherboard, atx, am3, 750a, sli, ddr3"
has on it, so I assume you're having this problem with an older mboard.
If the time and date are set to defaults after you shut down the system, shut off the power, then turn on the power and start it up again, you have a Cmos battery problem.
- too weak
(they typically last about 5 years)
- upside down in it's socket, so that the polarity is wrong
+ is supposed to be visible when it's installed
- or - it has an improper connection - the top contact in the battery socket is bent and doesn't touch the battery, or there's corrosion in the battery socket that needs to be cleaned off.
Replacing the battery on the mboard - it's usually coined shaped and shiny - will fix your problem, if the present one is too weak or dead. .
You will get a Cmos Checksum Error or similar message the first time you boot - go into the bios and set at least the date and time, Save bios settings, and you won't get the Cmos Checksum Error or similar message the next you boot and after that.
I'm assuming this is about a desktop mboard.
If this is about a laptop mboard, you need other info.