850W PSU ENOUGH FOR 2 EVGA 780Ti CLASSIFIED IN SLI?

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KAMIKAZE88

KAMIKAZE88

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Apr 16, 2014
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Hi guys,

I want to buy another 780 Ti Classified to build a SLI system, I want to know if my SeaSonic X-850 has enough power to run those 2 cards in SLI. My PSU is pretty new (1 week) so i don't want to buy another one if possible. When I put all my specs here (http://extreme.outervision.com/psucalculatorlite.jsp), it says that a 850w PSU can handle SLI but with normal 780 Ti, My SLI build is going to be with Ti CLASSIFIEDs.
Thank you for your answer.

These are my PC specs:

RAM: Corsair Vengeance 16gb (2x8GB) 1600
MOTHERBOARD: MSI Z87-GD65 GAMING
CPU: i7 4770k 4.3 GHz
COOLER: Corsair H110
GPU: EVGA 780 Ti Classified
PSU: SeaSonic X-Series X-850, 850W + 80Gold
FANS: x5 120mm Corsair Fans
CASE: Corsair Vengeance C70
SSD: Samsung 840 Evo 120GB
HDD: Seagate Barracuda 1TB
 
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nikoli707
the classy ti running under water with a true 1.35v on the core pushing 1.45ghz will draw almost 35amps. the classy will go higher if you go hard. if you plan on overclocking like this you will be cutting it very close with an 850w power supply especially if your 4770k is running a 4.5ghz-ish overclock. but if you just running two classy ti's on air its doubtful you will have any problems with your psu unless you try suicide overclock benchmark runs.
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octaneurpc

octaneurpc

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Apr 8, 2014
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A single GTX 780Ti requires 300W. 300X2=600W.
Shouldn't be a problem at all.

Agree with ModernWarfare the Seasonic X Series is brilliant.
Another plus point, it is a Full Modular PSU.

Happy SLI Gaming!
 
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KAMIKAZE88

KAMIKAZE88

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Apr 16, 2014
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Thank you guys for answering, the thing is that mine are Classifieds, maybe they need more power than a normal 780 Ti. Am I wrong?
 
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nikoli707

nikoli707

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Jan 4, 2012
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the classy ti running under water with a true 1.35v on the core pushing 1.45ghz will draw almost 35amps. the classy will go higher if you go hard. if you plan on overclocking like this you will be cutting it very close with an 850w power supply especially if your 4770k is running a 4.5ghz-ish overclock. but if you just running two classy ti's on air its doubtful you will have any problems with your psu unless you try suicide overclock benchmark runs.
 
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