PSU calculators accurate?

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Ch33rios

Member
Nov 29, 2016
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I have a mini itx build with a Ryzen 5 1600, 2x8gb DDR4, 2xSSDs, and currently a GTX 970 all on a 450w SFX PSU. I just managed to snag a GTX 1080 (for MSRP!) and while it appears based on all the PSU calculators out there I've got plenty of power headroom, I wanted to get a more experienced opinion.

Are the PSU calculators trustworthy? If so it's at least showing some good buffer and I'm not riding the edge of PSU capability ;-)

Thanks for any input!
 

pricklypunter

Well-Known Member
Nov 10, 2015
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Canada
You really want to aim for about 60-70% loading, so I would say you are pretty close. Somewhere between 700-800W would likely be better in the long term :)
 

alex_stief

Well-Known Member
May 31, 2016
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Depends on the PSU. If you buy an "800w" power supply for 40$, aiming for low load is a good idea because it won't be able to handle much more in the long run. A quality PSU can operate near its rated wattage without any issues. In the latter case, 450W is enough for your hardware.