You also have to remember those older miners were using much older manufacturing technology. As the dies shrink on the ASICs the problems increase. You cannot company any miner made in the last 2 years with anything older, its like apples to oranges.
AHHHH...DON'T TELL ME THAT..
Bite your tongue..wash your mouth out with soap...
Shame on you..
Now spit, turn three times and SAY LONG LIVE S9's for each turn...