04-10-2019 08:07 AM
Welcome to the Community Forums.
There are different variants for the Ideapad 320 differenciated by its Machine type model number or MTM. There would be a lot and this includes CTO version (Customer-to-Order) as configured by Lenovo resellers so there is no specific list. differ with each featires and capacities of parts as example.
In terms of unlisted parts, I suppose those not showing in the FRU list here in the hardware manual (page 73 onwards) are unlisted that is not certified for the Ideapad 320 ABR.
Due to the risk of bricking the board, you may not expect OEM to modify it as it also defeats the purpose of whitelistings. Other parts not listed may still work but there is always no guarantee. You may also find BIOS modder groups online and still the disclaimers are strict.
I hope this helps answer what you got in mind.