Finding RAM MHZ

Raven_55

Honorable
Dec 5, 2013
42
0
10,530
I was going through my bios just looking at stuff and i came across a section that has my ram specs in it, while i was looking through it i noted that my ram MHz was 800 but while using CPU-Z it said it was 400MHz. What i want to know which one is correct, my bios or CPU-Z.