From the specs on the Lepa website, the supply is rated at 34A on a single +12V rail.
From this, it has plenty of power available for the GTX 1060 in a standard system.
The quality how ever is pretty suspect:
- They list Active PFC for EU models only (N500-SA-EU but not N500-SA). Active PFC is a basic requirement for and decent PSU.
- No 80 plus rating. This is a rating for efficiency, but any supply that can't meet the 80 plus requirements is usually terrible quality.
Data sheet: http://www.lepausa.com/downloads/datasheet_lepa_n.pdf
I would recommend you look at a better quality supply.
Here are some suggestions:
Rosewill capstone 450
XFX Pro 550
XFX TS 550
Seasonic S12II 430
Seasonic S12G 450
Antec HCG 520