There is 4gb of soldered ram and one that is not soldered. The bios is hard to access with this laptop. You have to do it through windows instead of the lenovo boot logo and 6 mins ago i called lenovo themselves and i will have to send it to lenovo themselves and they will
It is hard to match RAM that is soldered to the motherboard.
You will have to run CPU-Z, click the Memory and SPD tabs to gather as much data as possible about the RAM chips...then try to get a similar module that closely matches the soldered RAM specs.