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just put in a new card and trying to rule out the fault here. (which seems like just a defective card.)
attached is one of the logs with the failure.

The failure is happening when the new card is selected and I have moved the cards to different slots and the same card is still acting up.
Thought it might be a power issue but I am using just the 780 card in question and a 660 for viewport with a 1200watt... so that seems to be ruled out.
log says memory issues and but there is 5.5+ gb free space there so...
based on the log any thoughts of anything else that could be cropping up ?

I am currently trying to reproduce a failure in Octane standalone

you should check free vram of gpus. probably you are filling vram of device 1

both are 6gb 780's and using only ~364 MB for these scenes.
the scenes and render usually for 1700-4300 samples and then I will get a render failure... very strange.

try to hide some part of objects and materials. let's check so

there is only one object and one material in the scene. im guess there is something wrong with this particular card.

Llet me know if you solved the problem - i am about to buy 6gb 780s.

Are these evga or asus?

I have an EVGA 6GB card and the only time it does that to me is when I have a bunch of symmetries or things like that. For some reason my system RAM ramps up to over 12 GBs and then gives me a mem error saying couldn't allocate enough memory. I collapsed many symmetries and turned down some of the hypernurbs, then it only ramped up to 7 or 8GBs on my system RAM, no errors. Ahmet, does the conversion process use the regular RAM?

rodross wrote:I have an EVGA 6GB card and the only time it does that to me is when I have a bunch of symmetries or things like that. For some reason my system RAM ramps up to over 12 GBs and then gives me a mem error saying couldn't allocate enough memory. I collapsed many symmetries and turned down some of the hypernurbs, then it only ramped up to 7 or 8GBs on my system RAM, no errors. Ahmet, does the conversion process use the regular RAM?

hi,
i should explain little bit export process. Absolutely we need system ram to collect and prepare the mesh data. If you don't use any objecttag, all geometry will be collected a single mesh. So this can be very very big. Other meshes as renderinstances and contains objecttag. These are converted in single and small mesh buffers. You can compare this by using objecttags and without it. Worst things that you can do it, it's using much high polygon counts. Try to use lower amounts of polygons on objects as much as possible.