Looking for a list or blacklist of working x200/201/s 2x4GB memory sticks as there are many that do not work. I know that such list existed but I can't find it.
In general single sided ram sticks (1Rx8) do not work at all in dual-mode. Some double sided sticks (2Rx8) work, some not.
Let me list few examples:
Even if list doesn't exist it could be good to make such one again. For that all is needed is to post here your x20x Lenovo version and working ram brands and their serials. If you are using libreboot, it could be wise to state it too as it might have it own compatibility problems.Not working: