i am currently having x2 pc10700kingstone and x2 12800kingstone set in my rig, they are both capped on 1333mhz by my mainboard, but, they both support 1600 mhz or even more, and when i try to set them both to 1600mhz, first time my bios saves and boots in windows with 1600 mhz speed and with 1.65v . But if i restart the SO, my computer double restarts, and sets the memory speed to 1333mhz, and i wanted it to be 1600 mhz permanent. Is it a bios related problem or something? My mainboard is MSI P67A-C45 and i have 2600k I7 and a 580 GTX gainward 3GB. Xonar STX. PSU 750 W Sirtec. oh And a 240 GB SSD Samsung 840, and 1 terrabyte barracuda HDD.