MAXOFLIFE:
The only problem I have though is that I have had multiple different sources say that either 5v to the VIN will work and the 5v to the VIN won't work.
I didn't say "5v to VIN" (which won't work), I said "5V to 5V"...
If you definitely have a 5V step-up then connect it directly to the 5V pin. Not the DC jack, not the Vin pin.
(measure the voltage first if you're not sure)
MAXOFLIFE:
I'm just curious as to why some people say 5v while the website says 7v. I just don't want to screw up my board
7V is for VIN or DC jack (which are the same thing).
ie. 5V to the DC jack of an Arduino Undo won't work.