Issue Whilst Mining

Hey guys, I’m kind of running into an issue. While I’m mining Ethereum, my rigs seem to work perfectly. But the second I switch to RavenCoin it seems to not mine after a few minutes 4 GPUs shutoff and 2 run. 6 GPU mining rig. I have tried 2 softwares TRex Miner NBMiner

I would really appreciate some help and first to help me gets 50 free RavenCoin ❤️