ASUS ROG MARS760-4GD5 GeForce GTX 760x2

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Message 1475607 - Posted: 11 Feb 2014, 8:19:46 UTC
Last modified: 11 Feb 2014, 8:31:09 UTC

Those anyone have one of these babies monster running SETI and could tell about its real performance? It´s works as promised this could be the base of a big SETI cheap supercruncher.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121839

An the main question, how much power it´s realy uses, and if it uses power from the PCI-e or not (like the others top Nvidia cards)?
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Message 1475617 - Posted: 11 Feb 2014, 8:55:42 UTC
Last modified: 11 Feb 2014, 8:57:12 UTC

8 pin PCI-e power connectors can supply up to 150W and seeing as that has 2 of them then that's up to 300W (6 pins only supply 75W), but some power would also be used from the PCI-e slot as well so you could safely say that it would pull a lot.

ASUS rates their single GPU GTX 760 ROG as using up to 225W so 350-375W is very possible for that unit (funnily ASUS does not supply a figure for that card).

Cheers.
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Message 1475623 - Posted: 11 Feb 2014, 9:14:42 UTC - in response to Message 1475617.  
Last modified: 11 Feb 2014, 9:29:24 UTC

...(funnily ASUS does not supply a figure for that card).

That´s exactly the point why they don´t supply the numbers, strange no?

The 690 uses 2x8 connectors but not use power form the PCI-e, that´s why is easy to build a multiple gpu cruncher with it, not when you use the power form the PCI-e it´s another headache because even if the specs said you could use 75W form the PCI-e slot, you can´t due that on all PCI-e slots of the MB at the same time or you will simply melt your 20PIN power conector (or the auxiliary 12V MB 8 pins too) who drives the 12V, they conector can´t handle such high currents or even the MB printed circuit layers too.

What call my atention to this GPU it´s relatively low price (compared with the 690) and the more easy to handle top hot air exaust who could allow us to finaly build a 4xGPUx2 cruncher who could be used on office enviroment who forced you to keep your case totaly closed, with no liquid cooling and does not allow front exausts with a relatively low cost. 4 of this GPU cost about US$ 2600 a lot less than 4x690 who cost about US$ 4400.

<edit> i just find this on the google:

The ASUS MARS 760 video card has two 8-pin PCIe power connectors located along the top edge of the card that are needed for proper operation. ASUS suggests using a 500W or greater power supply with at least 24 Amps on the +12V rails for proper single card operation. These feels lower than we would suggest, but that is what ASUS put on the side of the retail box for suggest requirements.
Read more at http://www.legitreviews.com/asus-mars-760-4gb-video-card-review_131114#AbtWcyuic6U0Tx3I.99

But that sure add more confusion to my head, 24A@12V is about 288W so is so few for this kind of board.
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Message 1475632 - Posted: 11 Feb 2014, 9:53:14 UTC

Well it's cores and core boost speeds are higher than nvidia's GTX 760 spec's which are rated at a max of 170W and they also recommend a 500W PSU for the single GPU.

Plus if a single GTX 760 uses the full 150W through its 2x6pin power connectors then there's still 20W pulled from the slot.

Going on those numbers I certainly wouldn't try and run the GTX 760x2 with a 500W PSU.

Cheers.
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Message 1475671 - Posted: 11 Feb 2014, 12:20:10 UTC
Last modified: 11 Feb 2014, 12:21:09 UTC

After a better view on the review i find in the page 13 there is a real world power test: http://www.legitreviews.com/asus-mars-760-4gb-video-card-review_131114/13.

Seems like the GPU could use a lot of power from the PCI-e since when in heavy dutty it´s uses a lot more (close to the possible max of 375W) than the 300W avaiable on the 2x8pin connectors, so the rest must come from the PCI-e.

So it could be a good choice for those who have 1 slot and want to do SLI, but it´s sure a not good choice for multi-GPU crunching hosts if you care about your MB healty life.

Back to wait for the 790 be realeased...
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Message 1475699 - Posted: 11 Feb 2014, 13:33:21 UTC
Last modified: 11 Feb 2014, 13:34:18 UTC

Let´s do some math.

A common 780 (not Ti - the 790 must be 2x780 but heavely unclocked) crunching 2WU at a time crunch 1 AP WU in about 1hr (or actualy a little less 50min), that give about 50 AP WU/day/card.

With a 790 since must be a little slower this number must be close to 90 WU per day or about ~60K of RAC per GPU, a 4x790 could be a 250-280K RAC monster... if we could feed it constinuously with AP WU (since it could crunch easely 16 AP WU per hour!)
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Message 1475706 - Posted: 11 Feb 2014, 14:00:45 UTC

Wow nice card and power requirements aside, you cant go wrong with the Direct CUII type cooler ASUS uses. I have the 7950 model that's now two years old and gpu temps stay consistently below 130F. Fan noise is bearable at 100% load also. I would love to get the R9 290 DCII model as Newegg advertises, but not for $699 that's highway robbery :/
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Message 1475707 - Posted: 11 Feb 2014, 14:01:50 UTC
Last modified: 11 Feb 2014, 14:34:55 UTC

Actualy the normal crunching time on my 780FTW powered by an old & slow I5 CPU, is in the range of 40-45 min (10-15% slower than the Ti), that´s why i imagine 50-60 min on the slower sure downclocked 790 (to keep the power used under 300W as target by Nvidia) but x 2 (to GPU per 790)- so 100WU per day is not impossible for this card.

Don't be so happy about the limits, after this freenzy we will be out of AP WU for several days until all the tapes where splited for MB and sended to crunch on the users hosts and new tapes where DL.

BTW My ACX colled FTW runs at 70C, a little high temperature than 130F but remember here we are in the middle of the summer and we have no AC so the normal outside temperature is in the range of 32C or more, internaly... who knows? What i could say for sure it´s hot as a hell!.
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Message 1475852 - Posted: 12 Feb 2014, 0:12:04 UTC
Last modified: 12 Feb 2014, 0:17:20 UTC

Furmark Power consumption 402 W !! :)

http://www.techpowerup.com/reviews/ASUS/MARS_GTX_760/22.html

Edit: just for the card, not the whole system
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Message 1475869 - Posted: 12 Feb 2014, 1:07:04 UTC

Furmark Power consumption 402 W !! :)

http://www.techpowerup.com/reviews/ASUS/MARS_GTX_760/22.html

Edit: just for the card, not the whole system

Considering that PCI-e spec's at max can only supply 375W I wonder where they get the extra 27W from? (power measuring device not calibrated correctly?)

But yes it would certainly be a power hungry card in any system and I can see a lot of people having power issues with them (especially if they use ASUS's recommendation of "500W or greater power supply with at least 24 Amps on the +12V rails").

Cheers.
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Message 1476098 - Posted: 12 Feb 2014, 12:59:51 UTC

It is unusual for NVIDIA to let third parties use their chips and not the entire reference card. I don't see a reference 790 coming from NVIDIA now; the market now is not for more performance but low heat and power consumption.
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Message 1476105 - Posted: 12 Feb 2014, 13:28:51 UTC - in response to Message 1476098.  
Last modified: 12 Feb 2014, 13:44:09 UTC

You maybe miss this...

http://videocardz.com/48533/nvidia-launch-geforce-gtx-titan-black-edition-geforce-gtx-790

The 790 launch is very close, sure will be very few avaiable at the beggining but...

About the 760x2... i belive it´s not an option for crunching, for me at least, i don´t put any card who uses power from the PCI-e on my hosts here anymore, specialy on the 2 or 3 GPU´s hosts. I had very bad experiences about that in the past (melted connectors and damaged MB´s.). The question could be: Why if they need more power they simply don´t use an extra 6 or 8 pin VGA conector for that?

BTW you could use more then 150W of power from a 8pin connector if you don´t mind it will melt in some time. You could do that in prototypes cards, so extract 404W or even more is possible, in controled enviroments. The question is for how long? Sure you cant´t do that in a common ofice/home.
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Message 1476216 - Posted: 12 Feb 2014, 19:00:51 UTC - in response to Message 1476105.  

You maybe miss this...


I saw it but will believe it when I see it. Did NVIDIA ever let a third party use their chips in this way before?
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Message 1476244 - Posted: 12 Feb 2014, 20:15:27 UTC

A couple of companies have done "at their own risk" - I recall Zotac as being one of them.
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Message 1476261 - Posted: 12 Feb 2014, 21:06:52 UTC

NVIDIA started licensing their GPU chips to third parties in July of 2013. I don't expect to see a reference 790 any more then an Intel Haswell motherboard.
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Message boards : Number crunching : ASUS ROG MARS760-4GD5 GeForce GTX 760x2


 
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