Beside some technical advantages, each GPU receives it's own difficulty and an own job from the server this way, which is a more optimal way to distribute work across the solution space.
Cool, thanks for explaining.
Well, so far so good. Will keep running on the 7x GTX 1070s for now and monitor over the day. May switch over the 6x GTX 1070 rig as well depending on stability over the next few hours.
Also going to be doing intermittent mining with my GTX 1070 on my desktop PC (normal workstation running Windows 7).