How much wattage should my psu have?

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astroboy7867

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Nov 30, 2017
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Hello,
I'm building a micro atx or micro itx PC. (most likely atx) for music production (and possibly gaming in the future)

Planned Specs:
Intel - Core i7-7700K 4.2GHz Quad-Core Processor 7th gen
Cooler Master Evo cpu fan
16GB DDR4 Ram
B250 Motherboard
Non gaming mouse or keyboard (for right now)
2TB SATA 6Gb/s 64MB 7200 RPM HDD
200mm fan (and probably 2 80mm) or 120mm and x2 80mm
64bit Windows 10

I'll probably add a Gtx 1050 or 1050ti later so how much psu should I get taking that into account?

Also how much psu would I need without the gtx 1050? Thanks
 
Solution
Darkbreeze
That's ridiculous. You only need a good, and I DO mean good, 350-450w unit for that configuration. Even on the OC versions of the 1050 and 1050ti, where a six pin connector is also needed, the max capacity will be about 350w or so. Even without the GPU card, you should STILL get a PSU at least that capacity for system expansion and to allow your actual requirements to fall somwhat in the middle of the units range so that it is never actually near what the peak capabilities of the unit's rated range. This would work perfectly fine.

PCPartPicker part list / Price breakdown by merchant

Power Supply: Antec - EarthWatts Green 380W 80+ Bronze Certified ATX Power Supply ($38.59 @ SuperBiiz)
Total: $38.59...
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BadAsAl

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Oct 13, 2009
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The 1050 and 1050 ti take 75 watts and recommend a minimum of 300 Watts.
The i7 7700K takes 95 watts.
So if you go with a good 500 or 750 Watt PSU you will be fine.
I have a 600 Watt PSU with the i7 6700K and a 980 ti that takes 250 watts and it runs just fine.
 
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Darkbreeze

Darkbreeze

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Jun 24, 2014
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That's ridiculous. You only need a good, and I DO mean good, 350-450w unit for that configuration. Even on the OC versions of the 1050 and 1050ti, where a six pin connector is also needed, the max capacity will be about 350w or so. Even without the GPU card, you should STILL get a PSU at least that capacity for system expansion and to allow your actual requirements to fall somwhat in the middle of the units range so that it is never actually near what the peak capabilities of the unit's rated range. This would work perfectly fine.

PCPartPicker part list / Price breakdown by merchant

Power Supply: Antec - EarthWatts Green 380W 80+ Bronze Certified ATX Power Supply ($38.59 @ SuperBiiz)
Total: $38.59
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-11-30 16:10 EST-0500

 
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Solution
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aquielisunari

Judicious
Mar 31, 2011
6,499
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I'd buy https://www.superbiiz.com/detail.php?name=PSS12II520&c=CJ.

NEED? A 250W quality PSU if the 1050 isn't present. A quality 300W if it is.

You saw how much that 380W PSU was? I'd opt for the 520W PSU. But that's overkill Susan said. Yes there is a significant pad but with such a low load it will run cooler and quieter than a lower power PSU with a higher load. It'll be there for pretty much any upgrades.
 
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Darkbreeze

Darkbreeze

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Jun 24, 2014
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Who the hell is Susan and what does she have to do with anything? LOL.

Sorry, I was in a hurry earlier. That Earthwatts unit is well built. You could do far worse. But for the price range this is probably the better unit and sits you smack in the middle of the usable capacity of this unit meaning it has plenty of capacity to accomodate any spikes that might occur but will generally not be anywhere near capacity so as was mentioned you'll mostly if not totally be staying primarily where the unit can easily run nice and cool/quiet. Plus, it's compatible with the lower power states C states that 7700k uses, which that S12II unit, being group regulated, does not do. You'd need to turn off the C6/C7 states in the bios in order to use that S12II 520w model.

PCPartPicker part list / Price breakdown by merchant

Power Supply: Corsair - CXM (2015) 450W 80+ Bronze Certified Semi-Modular ATX Power Supply ($46.99 @ Amazon)
Total: $46.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-11-30 18:59 EST-0500

 
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turkey3_scratch

turkey3_scratch

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Jul 15, 2014
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Noise really depends on a ton of factors. A higher wattage power supply isn't necessarily quieter at the same load as a lower wattage one. Sometimes the fan in higher-wattage units has a higher start-up voltage, for instance, among other things. As for the S12ii 520W, above 300W they get loud. Above 400W they get really loud. There are reviews (in other languages, so a lot of English people don't realize this about these PSUs) that measure the noise level of the 2015 revision (the current one on the market).

As for noise on the Antec I'm unsure how noisy it is. But your system load shouldn't ever go past 200W, I'd reckon with a 1050Ti it's around 170W under heavy load, without CPU overclocking.
 
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