Your GA MOBO has a 'Dual BIOS' chip which means if you screw-up the back-up BIOS re-flashes the primary BIOS. The safest method to flash BIOS is through the BIOS and USB. Use the Q-Flash method which requires a Flash Drive formatted FAT32.
Nice 3-part video:
In short, if you have no problems then my best advice is NOT to flash.
Examples 'when to flash':
1. CPU requires newer BIOS version
2. Non-OS Instability
3. Peripherals e.g. 2TB HDD requires new BIOS.
4. Memory compatibility ; where current RAM is causing errors or stability.