Power Draw

[AWinchester]

hey guys just planning a build here

the pascal cards are really efficient and not as power hungry as the maxwell cards so i was planning a build using 2 1080's in sliand im'm kinda syuck on what power supply to buy i was going to go with a 1000 watt P2 from EVGA but seeing the efficiency of the new cards i dont if i should go with a 850 watt psu 

suggestions anyone???

i want to overclock and try to hit a stable 2.1 GHz on the gpu's and somewhere in the ball park of 4.4 GHz on my cpu or as far as i can get on both things

i will be using 2 EVGA FTW 1080's and a 6800k on the asus x99 deluxe 2 mobo

[ENiX]

So here is the thing. I'm running two Xeon E5-2670's 8x HDD a gtx 570 and a GTX 780 and I have never seen above 600 Watts used via the monitor on my AX1200i.

 

I can't image you would have a problem with a 850 watt PSU.

[WereCat]

For PC with SLI 1080s 600W PSU will be enough..even most good 550W should handle it just fine with still some headroom in typical gaming scenario.

[HKZeroFive]

1000W is ridiculously overkill and even 850W is still too much.

 

I wouldn't be surprised if you could run that rig on a 650W PSU.

[AWinchester]

4 minutes ago, ENiX said:

So here is the thing. I'm running two Xeon E5-2670's 8x HDD a gtx 570 and a GTX 780 and I have never seen above 600 Watts used via the monitor on my AX1200i.

 

I can't image you would have a problem with a 850 watt PSU.

are you running stock clocks and no over volts or do you have any OC's

sorry if im overly cautious im kinda new to this overclocking i've tried it before but this is going to be my first OC and custom water cooled build

[ENiX]

Stock clock on the procs. 230 Watt between the two CPU's

~7% overclock on the two GPU's

[ENiX]

20 minutes ago, AWinchester said:

are you running stock clocks and no over volts or do you have any OC's

sorry if im overly cautious im kinda new to this overclocking i've tried it before but this is going to be my first OC and custom water cooled build

http://outervision.com/power-supply-calculator

 

Plug in the settings you plan on using and see what it says.

[AWinchester]

25 minutes ago, ENiX said:

http://outervision.com/power-supply-calculator

 

Plug in the settings you plan on using and see what it says.

it gave me 810 watts with the core clock on the gpu's at 2139 with no oc on the memory and the cpu at 4.4 ghz at 1.3 volts

 

[ENiX]

 

2 minutes ago, AWinchester said:

it gave me 810 watts with the core clock on the gpu's at 2139 with no oc on the memory and the cpu at 4.4 ghz at 1.3 volts

 

Keep in mind that's a worse case scenario number that takes into account 10% capacitor degradation for x years. 

 

So you would definitely be safe with an 850 Watt PSU

[HKZeroFive]

57 minutes ago, AWinchester said:

it gave me 810 watts with the core clock on the gpu's at 2139 with no oc on the memory and the cpu at 4.4 ghz at 1.3 volts

Power supply calculators are basically random number generators, third-party reviews and benchmarks are better sources for determining how much you need. I seriously doubt it'll even reach 600W under full load and for the overclocks you're aiming to go for.

[STRMfrmXMN]

2 hours ago, ENiX said:

http://outervision.com/power-supply-calculator

 

Plug in the settings you plan on using and see what it says.

I see that calculator here all the goddamn time, it's not good. It wildly overestimates how much power systems use.

 

2 hours ago, AWinchester said:

hey guys just planning a build here

the pascal cards are really efficient and not as power hungry as the maxwell cards so i was planning a build using 2 1080's in sliand im'm kinda syuck on what power supply to buy i was going to go with a 1000 watt P2 from EVGA but seeing the efficiency of the new cards i dont if i should go with a 850 watt psu 

suggestions anyone???

i want to overclock and try to hit a stable 2.1 GHz on the gpu's and somewhere in the ball park of 4.4 GHz on my cpu or as far as i can get on both things

i will be using 2 EVGA FTW 1080's and a 6800k on the asus x99 deluxe 2 mobo

A 750W EVGA G2 is fine for you with tons of overclocking headroom.

[Mira Yurizaki]

I have never seen any of my single GPU builds go over 230W (and these had at least i5's and just below flagship GPUs). And an SLI build I had pulled about 330W from the wall.

 

So give or take, 450W is the minimum as long as it's a great quality supply.

[AWinchester]

i think i will just go with an 850 watt appreciate the help