NBMiner 42.3 - RVN-KAWPOW AMD 5700XT only 15 MH/s ( teamredminer 26MH/s)

[NucleaR-II]

Hello, I can't get the full speed with NBMiner only 15MH/S, with teamredminer I have 26MH/S, do I have to set something ?

Thanks for your help