Quick server motherboard question

I have a quick question regarding the motherboard of my school’s old firewall. I recently opened it up after installing a new firewall and i noticed that it has both regular and laptop ram slots.

Why would it have a sodimm slot near the pci lanes?

Just curious no actual need to know.

Hmm. I'm not a big server guy. I'm wondering if that's intended for something proprietary rather than SO-DIMMs. Do you happen to know the make/model of the MOBO?

it is a supermicro x7sbi.
I couldn't find a reference to what is is on the website.

I think that is a IPMI slot. Or what they call SIMSO IPMI.

http://www.supermicro.com/manuals/other/AOC-SIMSO.pdf

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Yep thats what it is.

@greenwithao check page 10 of the manual:
http://www.supermicro.com/manuals/motherboard/3210/MNL-0954.pdf

"SIMSO IPMI 2.0 Socket"

"A SIMSO IPMI (Intelligent Platform Management Interface) 2.0 Socket is located on the motherboard. Refer to the layout below for the location of the SIMSO Socket."

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Thanks didn't see that pdf. Probably wont need that. looking to install rockstor or freenas on it for extra backups.