Im also making another pc and well Im not good with psu's
pc specs:
Gtx titan 12gb with a reference waterblock
I7 6700k custom water loop
64gbs of ddr4 ram
12 case fans 6 are led
280mm radiator for the cpu
And a led strip from phantek
650w or larger from tier 1 or 2.
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html
Only 650? I uhh kinda want to be on the safe side lol
650w is plenty even with overclocking. I run a Gigabyte Xtreme 980Ti and overclocked i7 3820 that use a far bit more power than yours and total system power usage maxes at 530w with a typical gaming load of ~450w. Your system will likely use less. But if you feel you need more get a bigger unit there no harm in getting a bigger unit than needed.
Sorry I had to go to work and forgot about the forum after a few days
I'm building both currently one for my wife and the other for me
Both gonna play some games