What is the max frequency? 1866 or 2400?

Xttony

Distinguished
The real maximum support is 2400MHz but your fsb maximum frequency is 1866MHz. So if you install a ram card with 2400MHz frequency it won't be beneficial, it will work like a 1866MHz card.
Also don't go for slow memory like 1333MHz as your processor uses the ram also as video memory it is always good to have greater speeds for video memory