Power supply recommendation

PSUs: The source of DC power for all components in the PC & often a big noise source.

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san14
Posts: 2
Joined: Tue Dec 09, 2014 3:57 pm

Power supply recommendation

Post by san14 » Tue Dec 09, 2014 5:19 pm

Hello.
What would you recommend to this system, is 550W enough or should you go higher. And of course I want a quiet one.

Specs: Core i7 965, GTX 780, 8 gb ram

My system in extreme power calculator.
Minimum PSU Wattage: 436 Watts
Recommended Wattage: 486 Watts

A few I have looked at.
Cooler Master V550S 550W
Seasonic G-650 650W
EVGA SuperNOVA G2 750W

CA_Steve
Moderator
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Joined: Thu Oct 06, 2005 4:36 am
Location: St. Louis, MO

Re: Power supply recommendation

Post by CA_Steve » Tue Dec 09, 2014 8:22 pm

Welcome to SPCR.

Your stressed load power can be estimated by just adding the TDP of the CPU plus the gfx card plus ~50W for the mobo, fans, and a couple of drives. Figure 130W (CPU) + 250W (GPU) + 50W = 430W. Your gaming load is probably closer to 350 to 380W. If you overclock or overvolt, then these numbers are higher. Usually, that power calculator says closer to 2x the estimated load. odd.

Quiet is relative :) How much do you want to spend and does it just need to be quieter than your other components?

Depending on the case, you could get a passive PSU in the 500W range. Or, you could get a semi-passive PSU that will be silent for lower loads and spin up to a quiet level while gaming (probably in the 600W range give or take 100W.)

What case do you have?
What are you using for the CPU cooler?
Which model GTX 780?
Are you in the US or..?

san14
Posts: 2
Joined: Tue Dec 09, 2014 3:57 pm

Re: Power supply recommendation

Post by san14 » Wed Dec 10, 2014 7:53 am

Thanks for the answer. I went on and bought the EVGA SuperNOVA G2 750W. Supposedly the best power supply for the money, the fan doesn't turn on on lower loads.

Abula
Posts: 3662
Joined: Tue Nov 02, 2004 12:22 pm
Location: Guatemala

Re: Power supply recommendation

Post by Abula » Wed Dec 10, 2014 7:01 pm

san14 wrote:Thanks for the answer. I went on and bought the EVGA SuperNOVA G2 750W. Supposedly the best power supply for the money, the fan doesn't turn on on lower loads.
Its really good PSU for the money, i did a build for a friend recently and no complaints, didn't heard any coil and the load was still very low to move the fan, for me its inaudible, but we never really push it with multiple gpus or high overclocks.

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