OTOY Forums

Hi,

sorry, assume, that this is not Octane related, but
I need urgend help please!

To render independendly from a second computer with second license,
(not the fastest i/2006K with 16Gig Ram - but a big tower
with good cooling) I ended up to put a Titan-Z into that machine.

My problem is, that the Titan-Z does not render like it should.
GPU-Z shows me a GPU-Load (and also power consumption) toggling
from 1 to max. 35%. Rendering takes years!

I have unchecked "use priority" on both Titan-z GPUs.
I have set in nvidia settings all values to max power.
I have deactivated energy settings in windows settings.

Is my PC too slow for that card?
When putting a second, older, GForce Card in, I get
system crashes (maybe because of too less power supply)

Any idear what else I could check, to get my Titan-Z to run with full power?

thanks
MIke

what psu are you running? how much watt?

Hi whersmy,

can't tell. There's no info on the case of the PSU.
Its a "Cougar" from an Atelco PC I bought a few years ago.
So surely not the most powerfull PSU.

A few days ago, the Titan-Z runned corretly, but only for one time.
But from 20 render tries, 19 had/have the probem with GPU working
only with 30% load.

thanks
Mike

sounds like a over heated gpu. Check peek temperatures

Hi,

temperatures are around 50/60 C° which is normal I think.
So with 30% Load and PowerConsumption it should not overheat.
(speaks a non-expert )

With an additional older nvidiaCard in that machine I had crashes,
so I removed that additional GPU.

MIke

im almost sure its the beast titan-Z

im not 100% sure what the deal was with the 12V rail of a psu, but it`s probably the psu not liking the card.

you need a good rated psu for high-end cards like a titan-Z! reliability, stability.

what was the other nvidia card you tried?

Hi,

for testing I had a GTX 560 Ti together with the Titan-Z in the PC.

For a while this Comp worked well. The GTX 560 for Internet etc.
and the Titan-Z for Octane only.
But after a few days I had lots of crashes/automatic restarts during
rendering, so I removed the GTX 560.

The strange thing is, sometimes the Titan-Z runs with nearly 100%
when rendering. But its a lottery and since 2 days only with 30%.

I can imagine, that you're right with the PSU.
I'll try to get a stronger one, but this sadly does not help
me right now.

thanks
Mike

try a different psu!

a faulty psu once killed two gpu`s of mine...

ist not the PSU!

I changed the 700W PSU for testing with a beQuiet 850W and
sadly same thing. GPU Load only max. 30%.

Now I tested another Octane Project and here the Card
renders with full Load.

So its definately my Octane Scene!

But what could be wrong in the scene, that my Titan-Z renders
only with 1/4 speed?

Any idear?

thanks
Mike

o.k. when deleting "all" materials it works!

A big step further!
Now I "only" need to find out, which of the hundreds of materials
is causing this problem.

regards
Mike