Hello! I am new to computers, just recently built one. I am using an ASUS P8Z68-V motherboard and 8GB G.Skill Ripjaw 1866MHz DDR3 memory. The BIOS recognizes the correct amount of RAM, but the speed keeps reading as 1648 and claims my "max" speed is 1600MHz. It doesn't even give me the ability to choose the correct speed, so I reset the BIOS to defaults and suddenly have the ability to manually choose 1866 as the speed. Upon bootup and checking the BIOS again, the speed reverts back to 1648MHz.
What's the deal? Is there some kind of voltage problem?