Hi guys I have a question about raven coin mining.

I've 4x 1080 ti
oc settings : power %75, memory +0, core +40 - +100. Daily income 160-165 rvn. Hash rate average around 60-65. Profit calculator estimations over 200-210 rvn. My actual income always -%25 less thand profit calculators.  What is your opinion my daily income normal?