800W enough for GTX 780 SLI?

[swchoi89]

HI,

I have a Fractal Design 800W PSU. Is this enough for my GTX 780 SLI?

I don't think I will overclock. If anything, overclock them slightly.

Thanks in advance.

 

[Liquid_Static]

800W should be enough for 780 SLI, assuming you aren't running an overvolted/clocked extreme edition CPU

 

[swchoi89]

800W should be enough for 780 SLI, assuming you aren't running an overvolted/clocked extreme edition CPU

No, just i5-4670K at 4.2Ghz.

Also, I'm not touching the voltages or anything on my GPU. Maybe slight boost on Mhz but that's about it.

Thanks for yoru response.

 

[Pandora's Box]

yes it will be fine.

 

[phillyboy]

I have two overclocked 7970s and an overclocked 3930k drawing about 650 watts from the wall. 800 watts is plenty and leaves you with adequate margin.

 

[Arkaign]

Yep, 800 is really somewhat overkill there. I like overkill though

 

[UNhooked]

Just don't OC the cards and invest in a watt meter.

 

[janii]

You could even tripple it

 

[Pandora's Box]

You could even tripple it

eh pushing it I think

 

[phillyboy]

I agree... you would be up in the 700-750 or so range... in general you want to keep 20% open on a power supply (yes the newer ones might be under rated but that is the rule of thumb)

 

[lavaheadache]

I'm doing 2 overclocked 780's and an overclocked I7 fine on a 860 watt psu

 

[x3sphere]

800 is more than enough, even with the cards moderately OC'd. Only when you start getting into voltage increases would you possibly need a beefier PSU.

 

[Teizo]

I'm doing 2 overclocked 780's and an overclocked I7 fine on a 860 watt psu

Good to know. Do you have a killawatt? If so, what are your max and usual power draws?

 

[lavaheadache]

I'm pulling just about 600 watts under load maybe a little more, as per my battery back up

 

[hawtdawg]

Yes, and you could OC them and your CPU as well.

 

[Teizo]

I'm pulling just about 600 watts under load maybe a little more, as per my battery back up

Cool, so even my 760 Plat would suffice.

Thanks :thumbsup:

 

[OCGuy]

I would read a review on your PSU, not all are the same. Wattage is not the only thing to look out for, either.

A quality 800w should do it, just keep in mind the smaller the margin, the shorter the life.

I ran 2 GTX280s on a Corsair 750w, and I would see my Killawat hit ~500w while playing COD4.

 

[swchoi89]

Thanks guys. Always good to hear from experts. Now I can go in peace and add another GTX 780. Probably don't need to overclock them anyways because I mean... two GTX 780s... haha

 

[KentState]

My system runs perfectly fine with CF on a 750W supply.