That's right, the manual is not specific to a PS / 2 or USB version join.
I tried all the shortcuts (space, power key, ctrl + esc) and none worked.
The power supply is the Corsair GX 650W 80plus Bronze. I also left the Jumper at + 5VSB but it did not work. Maybe I confused the Jumper?
Here is the Jumper location photo.
http://prntscr.com/jawcwl