Do I need an ATX PSU for an ATX motherboard and ATX case?

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broidk

broidk

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Oct 22, 2015
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I have no idea I have the EVGA 850W 80+ Gold Certified Fully-Modular ATX Power Supply in my part list right now. I need the 850w because I am getting an r9 390 (Though I am still not to completley sold on it I could still go with a gtx 970) And I want 80+gold because I want to not have to turn off my computer a lot.
 
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The ATX part doesn't matter in this situation. What's with the not turn off a lot business?

Gold is an efficiency standards, and it a bit more efficient than Bronze, but not a lot, and barely worth noticing unless power is crazy expensive where you are. The difference is about 5% at 110V.

What's your system exactly? A 390 does not need an 850W PSU, especially not one that good. It's a 275W dissipation GPU.
 
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I might get a second one though that's why and I read somewhere, where gold would be better if you don't turn your system off a lot. But what would a good bronze certified be? On pcpartpicker it said that a crossfire 390 would have around 777W or something.

Intel Core i7-6700K 4.0GHz Quad-Core Processor
$369.99

CPU Cooler
CRYORIG H7 49.0 CFM CPU Cooler
$34.50

Motherboard
Asus MAXIMUS VIII HERO ATX LGA1151 Motherboard
$219.99 -$10.00 $209.99 SuperBiiz

Memory
G.Skill Ripjaws V Series 16GB (2 x 8GB) DDR4-2666 Memory
$103.99

Storage
Samsung 850 EVO 250GB 2.5" Solid State Drive
$99.98
Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive
$73.95

Video Card
Sapphire Radeon R9 390 8GB Nitro Video Card
$329.99 -$15.00 $3.99 $318.98 Newegg

Case
Phanteks Enthoo pro ATX Full Tower Case
$99.98

Power Supply
EVGA 850W 80+ Gold Certified Fully-Modular ATX Power Supply
$129.99

Optical Drive
Asus DRW-24B3ST/BLK/G/AS DVD/CD Writer

I also put on some Noctua industrial fans(Just cause of the black) But I might not get them to save on cost for now.
 
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If you plan to use two cards at some time in the future, then 750 is needed for 2 x 970, and 850 for 2 x 390.

Gold will draw about 5% less power from the wall to run your computer because of its increased efficiency, if that matters.

Now that you have told us you plan to Crossfire or SLI, that is an excellent PSU choice. Most PSUs you could buy will be ATX anyway, so the original question is almost moot. What other alternatives did you consider>
 
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When I first started to do PSU I didn't really know anything at all. It was recommended to me and I went with it because it seemed good and was from a respectable company. I don't really know any other good alternatives, which is why I am asking for some (Mainly for my friend who is also going to build a PC but isn't going to need a huge PSU)
 
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