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ASUS Z790 Maximus Hero bios time/clock runs faster after manually set the time

Level 7

I just built a new system with the followings specs:

ASUS Z790 Maximus Hero
G.SKILL 64GB Ripjaws S5 DDR5 6000MHz CL32 KIT (F5-6000J3238G32GX2-RS5K) 2x32
INTEL Core i5-13400 1.80GHz LGA-1700
Windows 10 Pro

Everything went smooth, no compatibility issues whatsoever.
I have one problem:

The time in bios, the clock, once set manually, it runs faster.
If you set it to 09:53:20, after 4 hours it is already ~10 minutes faster.
Instead of 13:53 it shows 14:04.
After one day is almost an hour and a half offset and still rising.
Also, in Windows, the seconds run twice as fast in system time/date clock settings.
Everything is on auto, in Windows and in BIOS.

No matter how many tutorials I've watched, set another time server, resynchronize the clock in Windows, calling services and running cmd commands ... the clock in Windows "beats" faster, almost three times as fast as it should.
The one in bios is not as fast but still derrails by a significant amount in a short period.
Updated bios to firmware 0904 today ... same issue.

Please help if you can. Thank You.


Customer Service Agent


According to your description, it is recommended that you refer to [Motherboard] How to replace CMOS battery on motherboard when it runs out power ? to replace the battery, and confirm if the problem can be solved after replacement.

Thank you.

I have the same issue on B650M-A motherboard, probably after selecting memory overclocing profile.

Can anybody explain, if it is a BIOS bug?