Sector 5 - 4GB DDR3 PC-12800 / 1600Hz - I don't think the P5E3 takes my memory :/
is this correct anyone? Would like to know asap as i want to order
Why do you say that?
If it worked with your X38 Maximus Extreme, it will in all likelihood work with the P5E3 Pro, as the X48 chip is simply a better quality X38 chip...