Bear with me here, I am not too savvy with these things..
I have corsair xms3 memory and it says 1600Mhz on the box..
but this is what I see in cpu-z.. I must admit out of curiosity I used the gigabyte easytune software once, I wasn't really sure what i was doing, I only clicked the "Level 2" button and it did everything to overlock..(you know I'm no overclocker) but i set it back to default on the next reboot so i don't know if that changed anything?
I see 664.7mhz..??