Yes, because you're going to undervolt them, they will do around 130w, 135w each, so it will more than enough. It could be ok even for 8 gpus.
Ok thanks.
I read as well that sometimes even when undervolting there are cases when the settings will go back to default. At max wattage is the 1600w psu still ok? I just don't want to end up with fried GPU's!