GTX 780 Ti on Antec EarthWatts EA-750 Green 750 Watt PSU?

BenTan

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I recently bought a GTX 780 Ti. I noticed that it requires +42A on the +12V rail. The PSU I'm using has four +12V rails each rated at 40A and I'm not sure if this meets the requirement of 42A. Right now I have 2 separate PCI-E cables connected to the card and it seems to be running fine, significantly faster than my previous card (GTX 670). Crysis 3 is the only game that doesn't seem to be running as expected. Can someone confirm if this PSU is suitable for running the card at its full potential? I'm also planning on upgrading my PSU so I can add another 780 Ti in the future. Any suggestions to what PSU I should get would be welcome. Thanks!

PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E16817371051

Specs:
CPU: i7 3770K @ 3.5Ghz (3.9 Ghz Turbo)
Memory: 16GB ram (2x8) @ 1600Mhz
GPU: EVGA GTX 780 Ti (Reference)
Motherboard: Gigabyte Z77X-D3H
 
Solution


850 is recommended as some PSUs can be real junk. That Antec has 160amps on 12v which is more than enough for 2x 780 Ti.

Dark Lord of Tech

Retired Moderator
GTX 780 Ti on Antec EarthWatts EA-750 Green 750 Watt PSU? < Yes easily

For future SLI of 2 780ti reference cards:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: EVGA SuperNOVA 1300 G2 1300W 80+ Gold Certified Fully-Modular ATX Power Supply ($202.98 @ SuperBiiz)
Total: $202.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-03-24 09:05 EDT-0400)


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BenTan

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Mar 24, 2014
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Thanks for the replies guys. I'm still pretty confused about the 42A on +12V rail requirement. My PSU has four +12V rails at 40A each. Does that mean my PSU meets this requirement? Sorry if I don't make much sense, still pretty new to this.
 

BenTan

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Thanks for the reply. I agree 1300W is kinda overkill. But I'm a little skeptical about running two 780 Ti on a 750W PSU. From what I hear, 850 is recommended. I also heard that the number of Amps on the +12V rail is a more important factor. My PSU has four +12V rails unlike most others which only have one and that kinda confuses me about whether my PSU is suitable.
 

BenTan

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Thanks for the reply. The PSUs i'm looking at are the Corsair AX860i, Corsair RM750 and cooler master V1000 and V850. Planning on getting a new PSU not just for performance but for looks as well.
 

RobCrezz

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850 is recommended as some PSUs can be real junk. That Antec has 160amps on 12v which is more than enough for 2x 780 Ti.

 
Solution

BenTan

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Mar 24, 2014
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Thanks again. I'll probably stick with my current PSU for a while then.
 

BenTan

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I am thinking of getting the Seasonic X-850 for future sli of gtx 780 ti. What do you think?
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151102
 

BenTan

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Hi there, It ran fine. I recently changed my PSU to a Corsair ax860i and noticed no difference in performance. I got the same results on the 'Thief' and 'arkham origins' benchmarks though they're not the most reliable benchmarks to use. From what I've heard, the 42A requirement isn't realistic so if your psu is similar to mine, you'll be fine. Hope that helps.
 

jezeey

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Jan 17, 2014
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hey dude thank you SO MUCH for comfirming that'll work :) litterly no one would spend their time to respond so i really appreciaet it :)
 

BenTan

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Mar 24, 2014
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No worries, happy to help :)