Hello. I have three boards (P8P67, P8P67 EVO, P8Z68 - V/GEN3) and they all have same problem. If you put TWO memory sticks in the same channel mother board show postcode 55. In any other combination is working fine. So to be clear i made a pictures which combinations dont work:
All ram stick are ok, processor is ok i checked them on couple different boards and all is working fine. All boards have new bios from official website. All crucial memory voltages are fine. All conections between cpu and memory are fine i (checked it with tester). Is it a HUB or SIO malfunction or something else? Thank you for any advise.