Sorry that I can't answer your questions directly -- Acer probably can, though.
I comment because there is a stream of similar questions on the forum that suggests that users have given up using desktop computer and expect to have some of the same flexibility about upgrading components when they purchase laptops.
The problem is that the laptop manufacturers seem to be going in the opposite direction -- trying to lock users into buying parts and upgrades (where these are even available) solely from themselves.
HP, Dell frequently get mentioned for blocking upgrades. I found this when trying to replace a CD drive that fit perfectly but was rejected by the Dell BIOS. There have been instances of users buying apparently identical mini-pci wireless to the HP component only to have it rejected because it wasn't HP branded.
If you have a similar issue with Acer I would complain -- this is the kind of restrictive trade practice that got IBM into antitrust litigation with the US government in the 1970s.