Lenovo G580

I've got a ramaxel rmt3170eb68e9w-1600 module that works at 1.5v. There's another empty slot to add RAM and I want to add another 4GB. I found RAM for sale that's 1.35v with all other same specs. Can they work together? I went to a computer store and the worker told me that it won't work but...

Hi, I have a Lenovo G580, which was password protected both in the bios and the HDD, and running ubuntu 18.04. I replaced the HDD with a SSD and everything seemed OK. I then installed ubuntu 20.04 LTS. I set the bios and HDD passwords, so I know the passwords. Now I notice that I am not asked...