Is a 750w PSU enough?

Currently going with the below build, and looking to OC.
According to extreme power calculator, with OC on CPU and GPU (given that the gigabyte card under load takes around 80w more than reference) will take up around 710w of power under full load.

Given that this is quite close the threshold, wondering whether a 750w PSU will be efficient enough/safe to run given that voltage spikes might just crash the PC altogether.
Should I upgrade to the 850w?
Thoughts below. Thanks.

CPU: i7 6700k LGA 1151 Processor OCd to 4.7GHz at 1.37v max (Intel specs)

CPU Cooler: NZXT Kraken X61 280mm Liquid CPU Cooler

Motherboard: GA Z170MX-Gaming 5

RAM: G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-3000Mhz Memory

SSD: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive

HDD: Western Digital Caviar Black 1TB 3.5" 7200RPM Internal Hard Drive

GPU: Gigabyte GeForce GTX 980 Ti Gaming Xtreme Edition 6GB

Case: Coolermaster Mastercase Pro 5

Power Supply: EVGA SuperNOVA 750w G2 80+ Power Supply

Case Fans: 6x NF-A14 PWM 140mm Fan

 
Solution
I have a Gigabyte 980ti Xtreme and an overclocked i7 3820(4.3Ghz). Total system power usage is no where near 700w. Power usage is around 520w( if memory serves) under full load in furmark(monitoring using corsair link on an ax1200i).


I don't know where you're getting your info, but a REFERENCE 980ti at stock settings paired with the OC CPU and other stuff adds up to 603w.
When you factor in the voltage drawn by the gigabyte GPU and OC, that's at least 700....
 


I feel like absolutely nobody is listening to what i'm saying....

 

AngelOfDarkness

Distinguished
Nov 8, 2010
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I know what i'm talking about pal.

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While the i7 6700 consumes about 78 watts when gaming as demonstrated by this same website reviewers.


Taking ocing, fans, and all the other components into account it gives you around 450 watts, i said 550 as an exaggeration just to be on the safe side. Stop taking what those idiotic automatic wattage calculator websites say as gospel.
 

bignastyid

Titan
Moderator
I have a Gigabyte 980ti Xtreme and an overclocked i7 3820(4.3Ghz). Total system power usage is no where near 700w. Power usage is around 520w( if memory serves) under full load in furmark(monitoring using corsair link on an ax1200i).
 
Solution