Can you guys provide a bit more information?
How long did you run the miner?
How many shares were submitted to the pool during your test?
Where any shares rejected? Were there any hw errors?
How does the pool report hashrate? Are you looking at a 24 hour average reported by the pool?
Which of the 3 hashrates printed by the miner are you comparing to the pool hashrate?
Can you post the output of the miner at the end of your test?
I've run the miner for a good 4-5 days on nanopool, each time I checked, saw the average xmr mined approx. 7% lower then whattomine and cryptocompare resulted (with deducing pool and dev fee) and hashrate 6% lower.
I've run on supportxmr for 24hours, still 6% lower. But now It seems more reasonable after 48 hours... will update!
I don't know about shares, supportxmr adds all my other miners.
No share rejected, no hw errors.
I am comparing the last hashrate of the miner, (pool)
Maybe nanopool was the problem, maybe because I have other, less powerfull miners on it?