What PSU will suffice for i7-7700k and GTX 1080Ti? Both non-OC'd

[awmslayer]

Corsair Hx750i:
https://pcpartpicker.com/product/BJFPxr/corsair-power-supply-cp9020072

Corsair Rm650x:
https://pcpartpicker.com/product/Rp8H99/corsair-power-supply-cp9020091na

Rest of the build:
https://pcpartpicker.com/list/JGcNbj

Thanks

 

[JackNaylorPE]

Best to follow nVidia's published recommendations:

https://www.nvidia.com/en-us/geforce/products/10series/geforce-gtx-1080-ti/

Thermal and Power Specs:
91 = Maximum GPU Temperature (in C)
250 W = Graphics Card Power (W)
600 W = Recommended System Power (W)4
One 6-pin, One 8-pin = Supplementary Power Connectors

http://www.guru3d.com/articles_pages/msi_gtx_1080_ti_gaming_x_review,7.html

Here is Guru3D's power supply recommendation:

Nvidia GeForce GTX 1080 Ti - On your average system the card requires you to have a 600~650 Watts power supply unit.
Nvidia GeForce GTX 1080 Ti SLI - On your average system the card requires you to have a 800~950 Watts power supply unit.

If you are going to overclock your GPU or processor, then we do recommend you purchase something with some more stamina.

 

[lumineZ]

Both of them to be honest, but I would go for the 750 just to give yourself more headroom if you want to upgrade later on

 

[BenJaD]

Corsair Hx750i:
https://pcpartpicker.com/product/BJFPxr/corsair-power-supply-cp9020072

Corsair Rm650x:
https://pcpartpicker.com/product/Rp8H99/corsair-power-supply-cp9020091na

Rest of the build:
https://pcpartpicker.com/list/JGcNbj

Thanks

Way back - one of my first builds in a full tower case; I kept adding drives until I needed more power than I had on the installed PSU - I solved that problem by shoehorning in an identical PSU and heated happily until I retired the machine. Ever since that time I have added the best power to cost PSU I could find. 2 parameters that the selection must have: 1: minimum of 700+ watts and 2: fully modular. The first time that you have to replace a non-modular PSU in a build that you have used you will probably never allow a non-mod PSU in a build.
I have seen comments here that indicate that a build 'doesn't need a ___ PSU'. Probably true at the first build, not so much after a year of adding new abilities to the build. In my experience I have never talked to someone who regretted a high wattage PSU.

 

[awmslayer]

They have different efficiency certifications though, like the Hx750i is +80 Platinum while the Rm650x is +80 Gold. Do these affect anything?

 

[awmslayer]

Yes, for safety reasons, I was leaning towards the Hx750i because it has higher watts for more headroom to be left.
And also it is "Platinum" in which I think is better than Gold? Though I still don't quite understand that part.

 

[BenJaD]

Yes, for safety reasons, I was leaning towards the Hx750i because it has higher watts for more headroom to be left.
And also it is "Platinum" in which I think is better than Gold? Though I still don't quite understand that part.

As I understand the Bronze, Gold, Platinum labeling it addresses PSU power efficiency. Eg. Bronze is 70% input to output, while Gold is 80% I/o, etc. Understand please that I claim no more expertise than having read a Wiki a while back that I vaguely recall.
FWIW I have two of the Corsair 750W modular PSUs. One in operation, the other waiting for the coin to purchase a CPU for intended test bed build. Think they were Hx predecessor - I am content with them.