Dual GTX 760 PSU requirements?

Hi Im Endy · Dec 21, 2013

Hi guys, I'm planning to add a 2nd GTX 760 into my upcoming build, and I was wondering if my current PSU could power it all up. The current PSU is a Silverstone 700w.

My planned build specs are :

MOBO : ASUS Maximus VI Hero
PSU : Silverstone 700w (If possible)
CPU : Intel i7 3rd gen 3770 (3.4Ghz)
GPU : 2x ASUS GTX 760 2GB OC edition
RAM : 12GB RAM DDR3
Storage : 1x Sandisk 128GB SSD, 1x 2TB SATA 5400rpm HDD

If there's anymore info you guys need, I'll add them ASAP.

nostall · Dec 21, 2013

According to Nvidia the minimum recommended power supply should provide a min. of 600W for the entire system, and a min. of 42Amps on the +12V rail for a system running a Single GTX 770; and a minimum of 850Watts and 62amps. The overclocked cards will require a bit more current then this.
Your selected PSU has only a total of 46amps on the 12v and therefore would NOT run a GTX 770 dual card (SLI) configuration.
I recommend a minimum 850 watt unit. Where (country) do you live so the forum can offer some suggestions?

lonewolf7 · Dec 21, 2013

GeForce GTX 760 2x SLI - On your average system the cards require you to have a 700~800 Watt power supply unit as minimum.

This PSU will be suitable :

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Power Supply: XFX 850W 80+ Bronze Certified Semi-Modular ATX Power Supply ($109.99 @ NCIX US)
Total: $109.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-21 13:30 EST-0500)

Hi Im Endy · Dec 21, 2013

nostall :

Dual GTX 770? Uhh... I'm asking about dual 760

and I'm from Malaysia, it's ok if you can't provide links to the PSU sellers, I know a few stores around my area that sell PSUs like Corsair and other brands

nostall · Dec 21, 2013

Hi Im Endy :

Sorry, must have been looking at the psu specs and confusing them with the graphics.
None-the-less, That psu will not have enough power to run 2 760's in SLI; They require a minimum of 50amps on the 12v and that Silverstone is rated at 46 max. and that at 40C not 50C; so it is conceivable that it could not produce that much current on a hot summer day of gaming because of internal temperatures.
And remember, you will need at least 2 8pin PCI-E connectors from the PSU (usually listed as 6+2pin = 8pins).
If you can find an AX, HX or TX 750 by Corsair, or even an 850watt by Corsair (Not the new RM series, still haven't perfected it), or lonewolf7's excellent suggestion of that XFX; those would all be good.
This is the page for Amazon.co/uk. They may very well be able to ship to you or, I noticed, there are other merchants located in the left margin. Also, lonewolf used pcpartpicker.com and you can specify your country in there and it will look for the part(s).
Good luck, sounds like a nice build.

Hi Im Endy · Dec 21, 2013

nostall :

Hi Im Endy :

Sorry, must have been looking at the psu specs and confusing them with the graphics.
None-the-less, That psu will not have enough power to run 2 760's in SLI; They require a minimum of 50amps on the 12v and that Silverstone is rated at 46 max. and that at 40C not 50C; so it is conceivable that it could not produce that much current on a hot summer day of gaming because of internal temperatures.
And remember, you will need at least 2 8pin PCI-E connectors from the PSU (usually listed as 6+2pin = 8pins).
If you can find an AX, HX or TX 750 by Corsair, or even an 850watt by Corsair (Not the new RM series, still haven't perfected it), or lonewolf7's excellent suggestion of that XFX; those would all be good.
This is the page for Amazon.co/uk. They may very well be able to ship to you or, I noticed, there are other merchants located in the left margin. Also, lonewolf used pcpartpicker.com and you can specify your country in there and it will look for the part(s).
Good luck, sounds like a nice build.

Corsair 850w should be good just in case I might continue upgrading my build sometime in the future, thanks for the help btw

nostall · Dec 21, 2013

You are very welcome, have a Merry Christmas and great holiday season.
UPDATE: sorry, damn, getting old really messes with the memory. I was supposed to include the link to Amazonuk. here it is:
http://www.amazon.co.uk/b/ref=sa_menu_cc/276-0076114-8555906?_encoding=UTF8&node=428655031

Hi Im Endy · Dec 23, 2013

nostall :

Hmm... Sad that ordering online PC parts ins't as easy as it seems for us Malaysians with "not able to be shipped to your country" problem for most sites and tight customs here... But I guess I could use amazon for reviews of good parts, thanks again

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