Hello, I have a Asus Z97A board and just got g.skill trident ddr3 2400 16gb ram, i noticed in bios it was running at 1333. i see a spot to choose the frequency and also the xmp area I read about. Is this overclocking? Should I enable xmp or set the frequency. Is there a noticeable jump from 1333 to 2400 thank you so much for any help.