to the First ones Yes
to the Second reply Yes
Are the two cards plugged in into the same cable from the psu
I could try the riser
But Why only in Neoscrypt I don't get it
Eventually I will try a New Riser but I don't have for the moment spare riser
I need to copy this into my signature because I say this so many times. Here goes. Get yourself a power supply tester. They are cheap and can come in handy for troubleshooting when power-related problems come up. Good ones are anywhere from $10-$15. Risers are something you need to keep on hand. If you wait until there is a problem to replace them then you could be waiting weeks or months. When everyone was scrambling to get graphics cards a few months ago there was a 4 to 6 week wait on risers. The ones that were available for immediate shipment were 10X the normal price. If you are going to be mining, the best time to get replacement parts is when your rig is running smoothly. Downtime equals a loss of profits. I'm not saying get replacement backups for everything, but it's hit or miss on risers. Power supplies would be next on my list.
If you don't have replacement riser now, switch the cards around so different cards are running off the same risers and power supply. If after the switch the same cards 1 and 2 are having problems I'd look at the power supply.
Edit: Are they all the same make and model cards?
Yes same model
yes it could be what you said as a protoccol
but I dont get it why on equihash is stable
Anyway thnx for help i WIll try a riser i have spare risers 2 *but not for the moment they are away from my current location
btw suggest a PSU tester pls amazon or ebay