PSU for Gtx 760 DC2 OC SLI

srhnd · Oct 14, 2013

Hello, will my PSU be enough for GTX 760 SLI

I currently have:

+5V 22A
+3.3V 22A
Total of these two 130 W

+12V1 35A
+12V2 35A
Total of these two 600W

-12V 0.3A
3.6 Watt

+5Vsb 3A
15 Watt

This is the specification of my PSU

It says Dual Rail 12v Channel
It is 700W Bronze 80 Plus

It officially states support for SLI gtx 660 and SLI 7850

ATX 2.3
700 W
Fan 1x 120 mm
PFC Active
80+ Bronze
Protection OVP, UVP, OPP, OCP, SCP

Conectors
20+4 Pin ATX 1
8 Pin EPS 12V 1
4 Pin ATX 12V 1
6+2 PCI-E 2
SATA 8
Molex 3
Floppy 1

It has technically two 6+2 PCIe powerconnectors

I assume I would need 4x6 Pin power connectors

Would this be enough for Asus Gtx 760 DC2 OC SLI on a 3570k Turbo OC 4.0 Ghz system?

If yes how will I connect the needed 2 extra power connectors? Through molex?

Thanks in advance!

rolli59 · Oct 14, 2013

What is the make and model although it is technically big enough? http://www.realhardtechx.com/index_archivos/Page362.htm

rezzahd · Oct 14, 2013

since the 760 is at about 170W - 190W I would say you should be able to run 2 760's but this also depends on your overall system wattage use.

srhnd · Oct 14, 2013

It is a Sirtec High Power Elements Bronze 80 Plus 700W model with the exact above specifications and it says it gives 50-60A combined current through 12V channels. I heard it is not wise to run over 80% of the total capacity of PSU continiously. Would 760 DC2OC SLI combined with 3570k @ 4.0 ghz turbo oc Plus 2x1TB WD Caviar Blue be below or above this limit?

I really don't want to take the risk of PSU catching fire or anything? Would that happen with the protection mechanisms it has?

Btw I am lacking 2x6pin power connectors so how am I to get around that?

rolli59 · Oct 14, 2013

What worries me is the lack of PCIe connectors, Sirtec though can make some good PSU's and some crap as well so I would replace with a quality 750watt with enough connectors and some more headroom.

Luka Prebil Grintal · Oct 14, 2013

well your PSU certainly wont catchfire... who told you that?

also there are 2xmolex to 6pcie converters out there

and running the PSU at full power will reduce its lifespan some, but not much

rezzahd · Oct 14, 2013

I would still recommend picking up a new PSU. Rosewill has some good stuff for a decent price.

srhnd · Oct 14, 2013

Yeah but where I live Sirtec is the bang for buck while others are a bit costly and I am already stretching my budget for 760 SLI so I don't really want to upgrade the PSU unless it is absolutely or justifiably reasonable.

It says it also makes PSUs for OCZ and Thermaltake. From what I searched a bit on internet when picking this one up I found out people like the elements series and recommend it as good build quality.

This is the link for the model.

http://www.highpower-tech.com/eng/product_page.php?class=20100527154213&id=20110523153730

Is there any downsides to having molex converters for power connectors of graphics card?

rezzahd · Oct 14, 2013

Since your doing SLI I would think to go with a higher wattage PSU but that unit would work as well.

Luka Prebil Grintal · Oct 14, 2013

yeah, also corsair has some of the most reliable and affordable PSUs. whenever i build, i mostly decide for corsair, and no probles have ever came from them.

i would reccomend you their RM850 unit. its a solid PSU with enough wattage to run your 2 cards

rolli59 · Oct 14, 2013

srhnd :

No down sides to using the molex connectors and the PSU is big enough just keep an eye out for instability which would be the first sign of if it is not handling it.

Mousemonkey · Oct 14, 2013

srhnd :

No, just use one on each card. I had two 170w cards running on a 620w PSU for about two years without any power issues and that PSU is now running SLi'd 660Ti's.

srhnd · Oct 14, 2013

Ok guys thank you all for being very helpful. One last question would be how I can measure the system wattage with for example onboard hd 4000 to give me an approximation?

Mousemonkey · Oct 14, 2013

srhnd :

You need to find the power specs for all the various parts then add up the wattage requirements.

rolli59 · Oct 14, 2013

You can do guestimation using this calc http://www.extreme.outervision.com/psucalculatorlite.jsp

srhnd · Oct 14, 2013

Ok thank you all again for your help!

srhnd · Oct 14, 2013

Guys I just wanted to write here that I learned the Asus Gtx 760 Dc2o has specifically only 1 8 pin power input. This is so damn great news. Just wanted to share the information.

"Unlike the EVGA card, which had two power plugs, the ASUS GTX 760 DCU II OC comes with a single, 8-pin PCIe power plug. That should be fine on a card with this relatively low TDP and is actually a very good thing for people with smaller power supplies."

http://www.overclockers.com/asus-gtx760-directcuii-oc-graphics-card-review

PSU for Gtx 760 DC2 OC SLI

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