Should I upgrade my PSU?

Jun 7, 2014
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4,510
I know I do not need a intel i7 processor but my father is paying for it and told me to get it.
Parts:
GPU: GTX 780
CPU: Intel i7 4790S
MotherBoard: ASRock LGA 1150
RAM: G skill Sniper 8 gb
PSU: EVGA SuperNOVA 750W
Case: Cooler Master HAF 912 Mid Tower
SSD: Samsung EVO 120gb
harddrive: 1 TB WD Blue
Monitor:Asus 23.6 inch
This is my gaming pc build. http://www.tomshardware.com/answers/id-2172667/1600-gaming-build.html I have posted another thread about it. I just want to know if I should indeed change my PSU to a 800w. I read some things about my processor needing more power but I honestly don't have a wide knowledge of computers so I am just wondering. I do intend on leaving my PC on 24/7. Thank You!