In BIOS do you see 2x4GB of ram? On second thoughts, please list the specs to your system like so:
if you're on Windows 10, include the version of the OS at the time of writing. What BIOS version are you currently on for your motherboard? You should also parse a link to the ram kit you're using. If you're not using a ram kit, you should invest in a ram kit and not mix and match rams on a build.