One gets old like a cow and never stops learning anyhow ( I´m not English native, so please forgive ) Things to check before adding more Ram: I was, until now, not aware, like maybe many other players, of the fact that most main boards do not support higher frequencies on the Ram memory bus when more than 2 memory modules are used. On can check that out on the main board manufacturer´s QVL ( Qualified Vendor List ). Just google it. Yeah, and if you want to enter Bios setup with a USB keyboard, it does matter in which USB socket you plug it into. USB 2.0 and with the black plastic vane. It would never ever happen to me of course, :slightly_smiling_face: :slightly_smiling_face: . Just heard it rumour wise.