Why dont my memory timings match up

I just bought PDC28G6400LLQK memory from patriot and it states the that latency should be 4-4-4-12, and run at 2.2 volts, when i do this the computer crashes and i get the blue screen. however if i swich the timings to 5-5-5-12 it does not crash. please help me with this if you can. my motherboard is d975xbx2