In Johnny Guru's review of this power supply, he does note that there is a slightly below average 12V ripple suppresion for this PSU but the PSU performance is not bad. So yes, the videocard should work fine with the gtx 1070, but if I were you, I would probably sell your current power supply and upgrade to maybe the 500B version if you wanted a cheap alternative. http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story&reid=384