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CMOS battery type for Rampage 6 Extreme?

Level 7
I started a build about 4-5 years ago with a 7900X on a Rampage VI Extreme, but I let it sit without use for several years. Now I think my CMOS battery is dead as I get a prompt to press F1 and reset AHCI or RAID in the BIOS. I get this prompt only if I have previously turned off the power to the MB, it boots fine if I leave the power to the MB on at the PSU switch.

What type of battery is used in the Rampage 6? I've scoured the manual and find nothing specifying which battery to use. Worst part of all this is I have to drain the coolant from my system and disconnect some fitting to remove the video cards to access the battery under the 2nd video card. (two 1080Ti's is SLI)

Any help you can give me is appreciated.

Level 7
I'm not sure about CMOS replacement as I've never needed one, but I'd take the one you have to a computer repair shop and ask for advice. They'll probably just sell you a replacement if they have one, and if not tell you what you need, free of charge.

Most motherboards use a CR2032 battery for CMOS battery, and it should say right on the battery itself what type of button battery it is.

Looks like it's a CR2032 for Rampage VI.

Level 7
It should be a CR2032 for just about any Motherboard ever built.

And YES, if you are not going to use the motherboard, take out the battery or it will drain it keeping BIOS settings till the battery dies. They can last over 10 years if they are not in the board.

Level 7
My problem just got worse. I had to remove the MB completely, because ASUS engineers attached the armor covering to the mother board with screws that can only be accessed from the backside, and my case is not open on that part of the mother board. Major pain. Finally got the armor covers off and I find the CMOS battery is completely different from anything I've ever seen. The battery is wrapped in a black vinyl with text on the outside that says "79A KTS 2032 3.0V" It has two wires attached to the battery and a micro two pin connector to the motherboard. I can't get the battery out as the vinyl covers the entire circumference of the battery casing. I can't find the typical latch release one would normally find on a CMOS battery to release it from the housing. Why does this battery have a cable attached to the MB? Is it a rechargeable battery? If so, why is it displaying all the symptoms of a dead battery?

Here's a pic (hope it displays): Can't get pic to display--it uploads but will not transfer image to the message.