My friend's Lanparty UT X48 T3R won't boot CAS 7 RAM. At first it was... bummer, but a little patience and hot flashing did the trick. All manufacturers have their ups and downs.

I have an Asus board, with "terrific" customer support. My P5VD2-X USB 2.0 front headers can only run at USB 1.0, Tech support told me not to use the front headers so that I can have all USB 2.0 ports. Amazing... best support ever.