Is a 1000w PSU enough for this setup?

cesar3594 · 19 Dec 2013

Okay so I'm gonna be running this setup, I've done calculations and I may need to a new PSU, I don't know though, I've tried to do calculation online but it all said I require more then 1000w, but many people tell me not go buy those PSU calculators anyways here it goes
Motherboard: Asus p9x79 WS LGA 2011
CPU: intel i7 4930k
GPU: GTX 780 TI Sli
Ram: DDR3 12gb 2133mhz
Cooling: Corsair H80i (liquid cooling)
Not sure about the hard drive, I know I got 1.15Tb
Anyways I have a standard 1000w PSU from dell (alienware area 51) is this good enough or do I have to upgrade to 1200w? I'm planning to O'C aswell

paulpicks21 · 19 Dec 2013

What is the brand of the standard Dell 1000 Watt? It may very well be a cheap PSU. It may not have the correct connectors your require either. I have to recommend an upgrade to a high quality branded PSU.

cesar3594 · 19 Dec 2013

paulpicks21 said:

What is the brand of the standard Dell 1000 Watt? It may very well be a cheap PSU. It may not have the correct connectors your require either. I have to recommend an upgrade to a high quality branded PSU.

I don't know where I can find that out, my psu is 5 years old

linnemeyerhere · 19 Dec 2013

cesar3594,
The info we require is on the PSU directly. Manufacturer, Model and any output information. Pictures are always welcome!
With the sizable upgrade you're considering I think a quality 1200 Corsair, Seasonic or EVGA PSU could be a smart investment again if the case will take the extra depth.......pictures always welcome.

kbrady1979 · 19 Dec 2013

SeaSonic or Corsair 1000-1200 Watt PSU, with a single +12v rail, and fully modular.......with a system as nice as what you have listed, there is no reason not to go all out on a new PSU. 5 years wear on a PSU is quite a bit.

There is a SeaSonic X-1050 and X-1250, and a Corsair AX1200(and AX1200i) that are probably some of the best PSU's on the market.

whs · 19 Dec 2013

The GTX 780 TI Sli needs 600W and the intel i7 4930k needs 130W. The rest of the components should be OK with the 270W provided that it is a solid PSU.

RoasterMen · 21 Dec 2013

Dell makes sure they have a good quality PSUs in their Desktops. There are some unknown Manufacturers that makes quality PSUs.

smarteyeball · 22 Dec 2013

cesar3594 said:

I don't know where I can find that out, my psu is 5 years old

Look at the sticker on the PSU itself. If nothing else it should have a code and should you at least the 12v rail amps etc.

However some PSU's do 'degrade' in efficiency over time, not being able to output to it's rated max. ~5yrs it's hard to say.

Dell have used a variety of PSU's over the years in Alienwares - Yours 'could be' a Neuton Power N1000E-01

With a minimum of 800W for 780 SLI, plus some overclocking I'd say you'd be okay. Although if you find you're getting a lot of restarts then would be the time to buy a new PSU.

crankypenguin · 23 Dec 2013

He will need serious amperage on the 12 volt rails for the 700 series cards. Don't forget about that.

madcratebuilder · 23 Dec 2013

The Alienware area 51 is one of Dells better desk tops. I don't think Dell would skimp on the psu they used. 1k watss should run your listed parts with no problems. Dell is known for using proprietary parts but the Alienware uses standard parts from what I read. Unless you are experiencing power issues I wouldn't worry about it.

Nvidia spec is 600 watts for the 780, I've had one hooked up to my kill-a-watt meter and at 100% it pulled 480 watts. Testing different systems for power consumption with the kill-a-watt has shown me that the high end boxes very seldom pull over 700 watts total in game play. In a bench test with all air and h2o cooling at max, cpu and gpu at max, I see just over 800 watts from a 9590 with a pair of 7950's, 2 loops and 10 fans. If you OC the cpu and gpu with voltage increases this number will go up.

If you do decide to replace your psu measure the replacement carefully, the high output psu can get fairly large and there is no standard on the length of the body.