Yes all slots are full,that's what even made this OC better imo,i tried with a single stick,the board was not the factor nor was the full slots.This frequency is legit.And why is a 3:5 ratio unacceptable? My score is correct.Could have went higher had the sticks allowed for more latency,could only go from a 5 to a 7,as those were the only options the sticks had as far as Latency timing adjustments.