I have a MSI P43 T-C51 Motherboard and my rams have a bad timings so when i put right timmings 4-4-4-12 at 2.1v the my pc wont boot , my mb automaticaly dettects it 5-5-5-18 at 1.8 v its there any problems if i leave the ram timmings automatically or i should configure manualy ?