Octane Manual - Troublshooting Section 6.7 seems inccorect.

[MB]

The index of this section mentions

6.7 OctaneRender works for a while then closes while rendering
however the write up of 6.7 describes a different issue.

I am experiencing this problem on several machines all have one or more gtx590's. I would like to get to the bottom of it, could you please point me at the appropriate answer to issue 6.7.

(I suspect it might be running out of memeory, except that the graphs on the UI do not indicate it is full, and then the system forces a reboot).

[FooZe]

Hi MB,

I have tweaked the online manual to fix the title of the section:
http://render.otoy.com/manuals/Standalone/?page_id=62

Double check the temperatures of the cards are not over the manufacturers limits (you can check the NVIDIA website for the limits and find various tools out there to give you a readout).

If the whole machine is locking up after some time, this could be power supply related (not enough power).

What kind of crashes are you getting?

Thanks
Chris.

[face_off]

Mark, make sure you have SLI disabled in the NVidia settings.

[MB]

Thankyou both for responding.

I'm still having issues. Essentially the screen goes black, and the system reboots. It seems to only happen when the user does something with the mouse. Turning on and off bloom a couple of times for instance, which causes more memory to be required. Turning on and off a gpu core seems to do it, both of these activities are not what most users do, but i have managed to recreate the problem by doing them. Changing resolution may also trigger the crash.

The temperature of the cards seems to be between 50 & 55 celsius.
each card has a dedicated independent 450 w power supply. It seems that the 590 can peak at over 490 watts, so this might be the problem, although it will crash when the card does not seem to be working too hard.

I do have a machine that has a quadro 5000 and a gtx590 in it that is not exhibiting this problem. The problem has shown up in the last couple of weeks which is when we finally upgraded all of our machines to octane 1.2, prior to that they were on octane 1.1 or verious beta's.


The base computer is a Dell T3500 with 12 gig of ram, single 8 core Xeon Chip (5630) running windows 7 Entiprise.

best

[MB]

A bit more info.

I can drive the temperature as high as 97 deg c by orbiting the model, it seems to settle at about 88-90 just rendering with no user fiddling about with controls.

I have pulled a card from each machine, and powered the rmaining 590 card by using 2 450 PSU's (8 pin from each). Since doing that to two machines I am unable to reproduce the crash on either.

I guess it was inadequate power, however the Nvidia site says the max GPU power draw is 362 watts for a 590, which is why we settled on these GPU power supplies. I now have 3 machines runnng at half the intended speed. Does anyone know of a dedicated GPU PSU that will fit in a harddrive bay in the 600 watt range.

thx

Also i meant to post this in the support forum, is it possible to move this thread to it.

[FooZe]

Hi MB,

I would try at least one machine with two 590's powered by 4 PSU's.
This should be overkill, but there is a nagging question in my mind as to whether you have solved the problem with more power, or by removing the 2nd GPU.

So it would be good to have 2 GPU's with ample power.
Another thing to monitor is their temperatures by themselves. Having two side by side is almost guaranteed to run hotter than just one.
97C is the maximum according to the nvidia website so it's possible you are approaching the limits.

It could be that 1.2 is using the GPU's more fully than 1.1, just enough to cause problems. It is very unlikely that octane's code is causing the system to halt (not directly).

Thanks
Chris.

[MB]

We bought a 1500 watt external evga power supply and are running two gtx 590s with no issues. Temperatures are in the low 90s under load.

There is monitoring software,on the power supply, apparentlly the peak draw is slightly under 600 watts.
The previous setup had dedicated 450 watt power supplies,to,each card so in theory 900' watts available.
I guess the previous power supplies did not really deliver that much.

Best

[FooZe]

Sometimes a 450W power supply will not deliver anywhere near this to the 12V rail that supplies graphic cards.
This could be the case if you are dealing with a server PSU which might be geared towards supplying 3.3 and 5V power or something.

Thanks
Chris.