Good News,
I just played 15 min of Arma 3 and had no issues.
This is what the usage looked like throughout the playing. I also received some assistance from geforce forum and a fellow suggested I put "-forcePState:0,0"
in the Target for a NVIDIA inspector overclock shortcut. It seems to have worked so far, but tomorrow when I have more time I can play for a longer session.
To answer my PSU, I have a Cougar CMX 700w. It is 80plus Bronze and around 2 years old.
I will be back in 8 or so hours. My bed calls me. :P