ASUS said that it does accept an 8GB RAM stick, but they said that after they said that it couldn't be updated. This was ot the only reason taht I think I was talking to an amateur.
They told me that it would be a 8GB DDR3L 1600 SDRAM.
The RAM stick that Crucial told me to put in it is an 8GB DDR3L 1866 SODIMM.
I have learned that a higher frequency doesn't matter because the system will just resort to the lowest frequency anyway, but....
...I'm not sure about the differences between SDRAM and SODIMM. I think the support person wasn't very clear on these things either.
Crucial said to update the BIOS and VGA. I got the BIOS updated, and that didn't improve things. I downloaded the VGA driver update too, but I'm unfamiliar about how to get it to install through the Linux Peppermint OS.
Any advice would be great.