no my miner is the private from sp it report what it get

what pool are you using? suprnova isn't on groestl but myr groestl

Turns out you have to use static difficulty with ccminer 2.0. I'm using diff 0.01 and it's reporting 65MH/s. Pool is reporting a similar hashrate.

ccminer 1.2-x15 is ~20% slower than 2.0 but works well with VARDIFF.

I can't get to 70MH/s even with GPU clock and voltages tweaking. I have a Zotac 1070 Mini.

Are you running with reduced tdp? you should get 75 on the pool easily.

flooding/trolling ?

That depends on the pool, not the miner.

did it with suprnova d=0.01 on the password but the miner still reports 0.01xx or higher than 0.01

apparently you can https://dgbg.suprnova.cc/

Sorry,
when I said it crashes my rig, it has nothing to do with your miner, I have another pb triggerd by ccminer 2.0.