GTX 780ti x2 overheating

[richertmx]

Hey guys,

so I´ve got this new rig which works fine now, I´m rendering with two 780ti´s and have my old 780 just for the screens. However, when I check the viewport the GPU´s already work at aroound 70° from the start, and start climbing awfully fast to high 80´s and 90 (within the first 20-30 seconds of rendering).

This doesn´t change when I add the 980 as render GPU.

Fans work correctly, but inside the pc case there´s very little gaps and the cards are very close to eachother.

Any suggestions how to fix this?

[Pschelfh]

I was also afraid of this, but mine don't seem to go much over 80 now (but I just have 2 of them).

Which brand are they? Mine are from MSI and they came with a program (can't remember the name, not in front of my PC) that controls your cards fan speed.
I've set it up manually to spin faster at higher temps and it seems to work great.

You might want to look into water cooling with 3 cards though...

Peter.

[oguzbir]

hey richer,
I think your msi 780ti's are using not nvidia's reference cooling system. With 1 fan.
Those cards arent built for sli gaming and/or rendering.
Putting them on top of each other, creates that problem.

Best practice should be water cooling them. If you're not that of DIY.
You might use card risers and move the card apart from each other.
I dont have any idea of that but there are many posts about it.

I dont think very good case ventilation would help much. But it might at some point.
I you're going to stick with your current case rig setup, you have to look for solutions for a great airflow coming in and especially exhaust the hot air out of the case.
Maybe putting two 12cm or 1 bigger fan on the side blowing fresh colder air on to the cards. but you have to manage other fans to push hot air out of the case.
Usually front case fans take air in. maybe you'ld need to add few fans on top of the case to send hot air out.
if you post a photo of your current case others people also would joing and help..

[rappet]

I had three msi 780Ti Gaming cards (2 fans on card), but even with a good airflow case I could not get them to run cool enough with them stick together in 6 slots. Sadly I had to leave on out to create space between the cards..
I have to say that the case has very good airflow, but it goes only from front and bottom (in) to back and top (out),
But nothing from the side panel.
and I think if I could have add a maximum airflow form the sidepanel (4x 12mm fans) might do the job.
Cheers,

[t_3]

like already posted, a cooler configuration with fans in the mid of the card (be it one or three) is pretty bad for horizontal stacking. even if you have a case with vertical alignment of the cards and one slot gap between 2 of them, the topmost (or rightmost) card draws way to much hot air coming from the top/back of the other card's pcb.

the best fan configuration for stacking is still the particular reference design with a single fan at the end of the card, that actually feeds most air from the back of the card - this even works with tight stacking and horizontal alignment of the cards (given a good overall airflow in the case):


any measure that may help without replacing the cards is probably going to get ugly and/or load; like removing the side panel of the case (which may help a little), or even placing an external fan there, to draw fresh air on the cards...

[richertmx]

Thanks for your input guys!

I won´t be replacing the cards obviously, so I guess I´ll try either extra fans on the side of the case, or watercooling. Any one of you experienced with this and can recommend hardware?

Merry Christmas =)

[alaman64]

An other option you have is the EVGA tuner. It let's you adjust fan speed per card and or over clock per card or under clock.

I used that program and told it to set my card fans to 75% constant. you could also theoretically under clock them by a few points / reduce their voltage with this utility. that should also lower temperatures.

http://www.evga.com/precision/


Hope this helps

Nick

[sikotik13]

Also, the MSI equivalent (which I use with my EVGA Cards, since Precision and me have issues), os called MSI Afterburner.

[Spectralis]

Aren't the 7xx cards designed to reach >90 degrees without any problems? I have 4x760's - two of the cards reach the low 80's and the other two hit low 70's. I've had no problems running them for days at a time at these temps. The one thing that helped reduce card temps was to lay my system flat on its side (although not very practical.) Card temps dropped by 10 degrees! I have a large case with a number of fans so maybe this helped when laying the case on its side.