Samsung NP300E5C-A01TR notebook normally have B815 celeron cpu and i upgraded to i5 3230m, everything works normal with the latest bios P05RAJ but every 30 minutes notebook shuts down, i waited at bios screen and nothing changed, as i know the motherboard is this BA92-11480A and is compatible with i5 cpus, it must be a bios issue but i couldn't find how to solve, can anyone help me about this?