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EVGA 780Ti Too much for my 750w PSU?

Tags:
  • EVGA
  • Power Supplies
  • Power
  • Graphics
  • Nvidia
  • GPUs
  • Graphics Cards
Last response: in Graphics & Displays
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November 10, 2013 7:14:28 PM

Hi everyone, First post

Anyway, I just brought the new EVGA 780Ti,

Im fairly certain I've plugged everything in correctly but when I go into a game or benchmark and the card 'revs' up the whole computer will switch off.

It has a 6 pin and 8 pin power connector, I have an 8-pin psu to 2x(6or8) power connector going to it, when the 6 and 8 plugged in.

So, the plug comes out of the psu and goes into the two slots on the GPU

My psu is the Seasonic 750W with 62A along the +12v rail
SEASONIC X-SERIES V3 750W 80PLUS GOLD POWER SUPPLY (SS-750KM3)

I've upgraded from the EVGA 660Ti,

I've done clean installs of all drivers, Tried installing on my current os and a fresh os, both do the same thing.

Okay here is something, when I reduce the power target in EVGA Precision the benchmark runs wonderfully,

At 60% It stayed on fine,
70% it lasted a little while then shut off
100% it shuts off almost immediately in benchmark

(ALSO, Skyrim, running ultra with all my Hd mods etc runs totally fine at 100% power target. Probably becuase it only runs at 23% utilization)

Other specs:
Intel i7-4770k @ 3.5GHz
Samsung 840 120GB SSD
A 1GB & 3 GB HDD
16 GB Ram
Corsair H80i
NZXT Phantom full tower case

Entire build was done in the last few months as well, a few days after Haswell was released in NZ, So its all brand new components

More about : evga 780ti 750w psu

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a c 723 ) Power supply
a c 165 Î Nvidia
a c 1432 U Graphics card
November 10, 2013 7:36:00 PM

Well the PSU is big enough and a quality unit. It is a single rail unit so you are not overloading one rail. The PSU came with more than one PCIe power cable so you can try hooking up two cables from the PSU to the card so you are actually on two connectors on the PSU itself.
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a c 80 ) Power supply
a c 91 Î Nvidia
a c 254 U Graphics card
November 10, 2013 7:50:54 PM

First thing to check is that your using the correct 8 pin cable. Do not use the 8 pin EPS cable which is for the CPU socket. You want to make sure that your cables are clearly marked Pci-e cable. Since that PSU has 4 Pci-e cables you can switch to the other pair and see if you get the same result.
You shouldn't have to lower the power target from 100% to get it to work.
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November 10, 2013 8:36:33 PM

I've tried with one and two cables, and made sure everything plugged in tight,
The cables are Pci-e, their certainly the right ones :/ 
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a c 723 ) Power supply
a c 165 Î Nvidia
a c 1432 U Graphics card
November 10, 2013 8:57:44 PM

Shut down like that is power issue so either the card is pulling to much or PSU is shutting down prematurely.
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November 10, 2013 9:40:31 PM

Im going to RMA my PSU, Perhaps they'll test it while im there so I can see if that was the issue

I'll keep you all posted on what happens :) 
Thanks for all the help :D 
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