Since GTX 760 is 170W GPU and you have Xeon in there, 600W range PSU would be enough for your PC, even when you OC your CPU/GPU. Here, i suggest getting any Seasonic unit, in 600W range. E.g G-650, Focus+ 650 80+ Gold, PRIME 650 80+ Platinum or PRIME 650 80+ Titanium,
pcpp: https://pcpartpicker.com/products/compare/R7V48d,nn648d,pHFXsY,WrNypg/
You'll get 5 years of OEM warranty with G series PSU, 10 years of OEM warranty with Focus+ series PSU and 12 years of OEM warranty with PRIME series PSU.
Also, PRIME 650 80+ Titanium is the best 650W PSU money can buy at current date and with it, you'll get the highest efficiency (94%), tightest voltage regulation (0.5%), longest hold-up time (30ms), lowest ripple noise (20mV) and longest...