How many rejected shares one got to be worried about? I'm using NBminer to mine Ethereum on nicehash pool so far I got 78 accepted shares and 9 rejected shares, should I be worried? Phoenix miner latest upgrade lower my hashrate that's why I switch to NBminer, seem more stable, I don't overclocked my gpu and it's temp is below 58°C
That's lot of shares rejection, you should be having two or three shares rejected after 200 shares accepted if it's pool problem, I'm using Nicehash and NBminer is one of the miners for daggerhashimoto algorithm on nicehash, it's quit stable unlike what you said, pls check your internet connection and also change pool server, EU, US, etc