drivers are 430.86, 451.67 and 460.89 all of these works
my .bat is very basic
miner.exe --algo ethash --server asia1.ethermine.org:4444 --user yourETHaddress.workername
you might be using 4gb system ram, make it at least 6gb .....this issue was already long ago too when it slowed my 1080ti, this might be your issue.
We might be talking about different hashrate.
Can you share your hashrate for 1070 and 1080ti? Already tried running one card with a single 4gb ram but the result still the same.
That's why I think we are talking about different hashrate?
Right now my 1080ti running at 44mh/s, pl+160.
What hashrate do I expect from gminer since you suggested it as you fixed your issue?