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

[BenTan]

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

 

[Dark Lord of Tech]

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)


Tier 1 Brands - The Most Powerful And Stable Components On The Market.

Antec Signature
Antec High Current Pro -1200w
Antec HCP Platinum 1kW
Cooler Master V series 700, 850, 1kW
Corsair AX
Enermax Galaxy
Enermax Revolution
EVGA SuperNova G2 1000W and 1300W
Kingwin Lazer Platinum
PCP&C TurboCool
PCP&C Silencer Greater than 610 watt
Sapphire Pure
Seasonic X-Series
Seasonic S12D/M12D
Silverstone ZF (Etasis 85/75/56)
Seventeam ST Greater than 600w (SSI, V2.91)
Silverstone OP/DA Greater than 700 watt
Silverstone ZM
Ultra X3 Greater than 1000 watt
XFX Black Edition
XFX XXX Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2

 

[RobCrezz]

Your current PSU will be totally fine, you dont need a new one. Assuming it has enough PCI-e connectors you can run 2x 780 Ti on that no problem. You dont need a 1300w PSU for SLI 780 Ti's.

 

[BenTan]

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]

Your current PSU will be totally fine, you dont need a new one. Assuming it has enough PCI-e connectors you can run 2x 780 Ti on that no problem. You dont need a 1300w PSU for SLI 780 Ti's.

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]

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)


Tier 1 Brands - The Most Powerful And Stable Components On The Market.

Antec Signature
Antec High Current Pro -1200w
Antec HCP Platinum 1kW
Cooler Master V series 700, 850, 1kW
Corsair AX
Enermax Galaxy
Enermax Revolution
EVGA SuperNova G2 1000W and 1300W
Kingwin Lazer Platinum
PCP&C TurboCool
PCP&C Silencer Greater than 610 watt
Sapphire Pure
Seasonic X-Series
Seasonic S12D/M12D
Silverstone ZF (Etasis 85/75/56)
Seventeam ST Greater than 600w (SSI, V2.91)
Silverstone OP/DA Greater than 700 watt
Silverstone ZM
Ultra X3 Greater than 1000 watt
XFX Black Edition
XFX XXX Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2

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]

Your current PSU will be totally fine, you dont need a new one. Assuming it has enough PCI-e connectors you can run 2x 780 Ti on that no problem. You dont need a 1300w PSU for SLI 780 Ti's.

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.

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.

 

[BenTan]

Your current PSU will be totally fine, you dont need a new one. Assuming it has enough PCI-e connectors you can run 2x 780 Ti on that no problem. You dont need a 1300w PSU for SLI 780 Ti's.

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.

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.

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

 

[BenTan]

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)


Tier 1 Brands - The Most Powerful And Stable Components On The Market.

Antec Signature
Antec High Current Pro -1200w
Antec HCP Platinum 1kW
Cooler Master V series 700, 850, 1kW
Corsair AX
Enermax Galaxy
Enermax Revolution
EVGA SuperNova G2 1000W and 1300W
Kingwin Lazer Platinum
PCP&C TurboCool
PCP&C Silencer Greater than 610 watt
Sapphire Pure
Seasonic X-Series
Seasonic S12D/M12D
Silverstone ZF (Etasis 85/75/56)
Seventeam ST Greater than 600w (SSI, V2.91)
Silverstone OP/DA Greater than 700 watt
Silverstone ZM
Ultra X3 Greater than 1000 watt
XFX Black Edition
XFX XXX Edition
Zippy/Emacs SSL
Zippy/Emacs GSM
Zippy/Emacs PSL
Zippy/Emacs HG2
Zippy/Emacs HP2

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

 

[jezeey]

hey PLEASE NOTICE THIS , did ur 780ti end up running fine on a 12v 40amp rail ? or did it throttle the GPU????

 

[BenTan]

hey PLEASE NOTICE THIS , did ur 780ti end up running fine on a 12v 40amp rail ? or did it throttle the GPU????

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]

hey PLEASE NOTICE THIS , did ur 780ti end up running fine on a 12v 40amp rail ? or did it throttle the GPU????

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.

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]

hey PLEASE NOTICE THIS , did ur 780ti end up running fine on a 12v 40amp rail ? or did it throttle the GPU????

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.

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

No worries, happy to help