What is the amount of power needed for this build?

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raltson188

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Sep 12, 2017
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510
Here are my computer specs (That Consumes Power):
Intel - Core i7-7700K 4.2GHz Quad-Core Processor
Gigabyte - GA-Z270X-Gaming 9 EATX LGA1151 Motherboard
G.Skill - Trident Z 16GB (2 x 8GB) DDR4-4266 Memory
2x Samsung - 850 PRO 2TB 2.5" Solid State Drive (4TB in Total)
AORUS GeFo​rce® GTX 1​080 Ti Wat​erforce WB​ Xtreme Ed​ition 11G (SLI)
3x Fractal Design - HF14-BK 118.2 CFM 140mm Fan
5x Fractal Design - HF12-BK 83.4 CFM 120mm Fan
2x Dell - S2417DG 23.8" 2560x1440 165Hz Monitor
2x EK-Cable Y​-Splitter ​2-Fan PWM
EK-Cable Y​-Splitter ​3-Fan PWM
EK-XTOP Re​vo D5 PWM
Normal Mouse & Keyboard (not decided yet but i don't think it takes a lot of power anyways)

I have been reading other posts saying that online pc voltage calculators are not accurate and I don't know how to calculate the amount of power needed as well, so please help me solve the followings:

-What is the actual amount of power this whole pc draws
-Some recommendations for a psu (that is also suitable if I want to overclock my system)
-Some recommendations for a ups (that is optimal for 8 hours of gameplay, it also has to match the psu that you recommend)
 
Solution
herrwizo
Worst case scenario (max load on all components simultaneously, hardly ever to happen):

Approx. 100-130W for the CPU (depending on your OC), 10W for RAM, 10W max for both SSDs combined, approximately 300W for the GPU, 20W for the motherboard, 10W for fans. Monitor uses its own power supply.

Raw power usage is therefore 480W, we can round it to 500W to be absolutely sure.

Of course, 500W PSU would not be enough for this - it would be stressed too much and die quite fast. You always need headroom for the PSU, at least 30% over the worst-case-scenario load.

A quality 650W PSU would work just fine provided you don't OC the GPU. If you intend to do so, 750W is your best bet.
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Sohom

Sohom

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Mar 6, 2017
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You need at least a 750 watt PSU. I also calculated assuming you are going to use an AIO to cool down your cpu. Some recommendation would be the corsair RM750x or the Corsair RM850x.
Here, you can use this link to calculate the wattage yourself:
http://www.coolermaster.com/power-supply-calculator/
 
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herrwizo

herrwizo

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Feb 17, 2009
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Worst case scenario (max load on all components simultaneously, hardly ever to happen):

Approx. 100-130W for the CPU (depending on your OC), 10W for RAM, 10W max for both SSDs combined, approximately 300W for the GPU, 20W for the motherboard, 10W for fans. Monitor uses its own power supply.

Raw power usage is therefore 480W, we can round it to 500W to be absolutely sure.

Of course, 500W PSU would not be enough for this - it would be stressed too much and die quite fast. You always need headroom for the PSU, at least 30% over the worst-case-scenario load.

A quality 650W PSU would work just fine provided you don't OC the GPU. If you intend to do so, 750W is your best bet.
 
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Solution
envy14tpe

envy14tpe

Champion
Mar 3, 2012
9,574
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56,665
For an expensive build like this...it is always good to add an extra 100W. I'd get, at minimum, 750W, or even 850W for better efficiency and peace of mind. You never know where the build will go.

Take average of these numbers you get from these:
https://seasonic.com/psu-calculator/
http://www.coolermaster.com/power-supply-calculator/
 
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