Secondly and more importantly, dial the fuck back on that memory OC unless you want to wreck your card, that is too huge, you need to start at +600 OC, run it for a while to heck if its stable, and then increase by 100, and repeat untill you find the max OC that runs stable for atleast an hour of mining.
Also, reduce the Power limit from 100% to like 60% if you are only going to be mining Ethereum since you do not need the core to clock to 1700+ as it doesent improve Ethereum mining performance anyways.
Cheers.
I got my mem to 600 now but may I ask how to know if it is stable or not ! when it was at 1000 mem i did not get any errors or anything
If mining runs fine for 1 hour on 600, then its stable. Then you can increase +100 and run for 1 hour again. Repeat untill you find highest stable memory overclock