Supermicro X9DR3-F's CMOS reset every time AC power is lost

[AREryilmaz]

Hello friends

I got two 12 core v2 xeons, 16x8 ECC UDIMMS, one infiniband card on one X8 slot and a GT710 in a another slot. I tried without the IB card but couldn’t without the GPU since I don’t have a VGA monitor in my house.

I tried reflashing and then upgrading and then downgrading the BIOS and the IPMI FW to no avail, I even used a USB drive to downgrade the BIOS to the 2018 version.

I scoured the manual for any sort of jumper configuration that would explain this behaviour but nope. I don’t have any older bios version so 2018 is the earliest and I don’t really think it’s related to the version in any way.

The CMOS battery is good, here isn’t any visible damage on the PCB either.

You may have wondered why I had to use a GPU and not the console; it doesn’t work. I really hate java.

I have seen this exact behavior in a Chinese “X99” mobo which is kind of strange. I couldn’t solve it on that one and cannot solve it on this one.

Help please…,

[jode]

@AREryilmaz

The CMOS battery is good

How do you know?

I thought keeping the CMOS content is the sole reason for the existence of this battery. This is the prime suspect for the behavior you’re describing.

[AREryilmaz]

Because I replaced the original battery I found on the mobo with a new one.
Edit: Turns out the second battery was somehow faulty. It read like .3V, I replaced it and everything is fine now.

Cheers mate!