hi, my vega 64 CN-R algo without tweaking Hashrate dropped from 2040 to 1970 moving from 187 to 188 , same config and same pool file and same coin. interesting is that my vega 56 didnt get affected. Im running low voltage settings on both cards (at the most stable possible setting)
This is interesting, yes, because on vega56 i do the testings, and nothing changed as you say.
Are you running the --resetvega parameter ? Also the same ODT as before?
Can you test it a few times, just to be sure that there is really a change in hashrate, because there shouldnt be...

I have an issue, my computer cashes because now SRB tries to use the Vega cores inside the Ryzen 2400G to mine, how could I disable the APU in your miner ?
Thanks
By now, you mean from v1.8.8 ? The ordering of the devices changed - they are now ordered by bus id so it is the same order as in ODT.
Run
SRBMiner-CN.exe --listdevices in cmd and set device id's you use according to that