If it isn't in the BIOS menu then it must be automatic & there is nothing you can do about that. You might just need to replace the RAM with something compatible. How do you know that its wrong? I ask because it doesn't crash windows but it does Linux as you indicated. Or does it only crash Linux when you try to install something? That would indicate that the problem has to do more with the OS than the hardware. Well I've reached the extent of what advice I have for you considering I don't know Linux all that much. Perhaps someone else, maybe even our Linux person, will have something. Sorry. Good luck.