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Is 850w enough?

smogsy said:
850W is fine

Plus when you upgrade to say 1180s The Wattage required could reduce by quite a margin :)
Click to expand...

what about 1080Ti?? :eek:

@OP
The fans spinning quick because its near its peak wattage and needs to cool components, but it will still be under 800 watts but only just.
 
Cheers guys, i wont be upgrading my gpu's until 2018 so who knows what will be out by then.

my psu is single rail, is that okay for running two cards?

xfx proseries xxx edition lol
 
850w maybe, 750w no. I've even had my old TI SLI setup max out my 1000w PSU with custom bios on furmark before. Maxed out at 1063w.

They system in total regularly pulled 8-900w+ while gaming under normal load.
 
No, it's not.

Why do I say that? Rig 1 in my sig which isn't too different from the OP, when playing NFS at 4K was pulling 812 watts from my 1000 PSU - I know this because I'd hooked up my original UPS (A 750 watt unit) and when I loaded the game, I was getting an alert telling me the UPS couldn't supply more than 750 watts. I then purchased a 1000 UPS and it's now fine. So the potential is there to draw close to 850 watts so I'd always purchase a slightly more powerful one to give you some overhead.
 
Not all psu's are equal its impossible to blanket say a 850w supply will be fine. The psu in your sig ain't bad but could be cutting it close with an overclocked cpu and sli cards especially as your running a hw-e cup and power hungry (relatively) 980ti's
 
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Mine pulls 810 watts from the wall in firestrike with my setup and top overclocks, with a 6 core i imagine it would be a little more. Still dontforget the efficiency is only 90% though so its only actually pulling 730 watts from the PSU so theres plenty to spare. For average use with lower overclocks it pulls way less, ya have to lift the cards power limits and TDP in the bios to make it pull this much power.
 
BinnsY said:
Must have been some seriously large overclocks for people to be pulling over 800w given that in this benchmark SLI 980ti's only pulled 550w even with a 140w core i7-5820k as the cpu.

http://www.eteknix.com/nvidia-geforce-gtx-980ti-6gb-sli-review/14/
Click to expand...

A quite normal 4.5ghz oc on a 5820k alone adds well over 100w to the power draw under load....

http://www.kitguru.net/components/cpu/luke-hill/intel-core-i7-5820k-haswell-e-6-core-cpu-review/8/

Add two overclocked 980ti's and you potentially exceed 800w under load.

Powers draw does not scale in a linear fashion with clock frequency when overclocking!
 
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I ran the below spec without a problem on a 850w, that included an overclocked 5960x @ 4.7, 7 solid states, 14 case fans, 2 980ti's, 32gb ram and all the rest without issues. I changed only because a friend was selling the bigger psu dirt cheap but the 850w was plenty.
 
Your current PSU is fine. It's a good unit and will have the necessary fail safe protections like overtemp, overcurrent, overvoltage etc.

If it struggles to provide the power needed then it'll let you know with massive throttling or it'll just shut down.

Though if it's too noisey and you've cleaned it out of dust and made adjustments to allow for more airflow then you'll need to start looking for a more efficient unit. I wouldn't be surprised if your current unit it generating 100W of heat converting AC to DC for your system.
 
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