old scene slower with more cards

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Wenneker
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Joined: Mon Jun 02, 2014 4:12 pm

I have a scene setup in 1.55 that I need to re-render. I'm using 2.04 for this.
Oddly enough it render "fine" when I only have 2 cards enabled at about 8Ms/sec but slows down to a crawl when I enable a third card. (0.3 Ms/sec)
It's a fairly simple scene and speeds up quite a bit when I hide/delete a few simple parts. Unfortunately I can't share the scene here because of NDA.
Win 7 x64 | i7-4930 | 64gb | 4x gtx 780Ti 3gb
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FooZe
OctaneRender Team
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Joined: Tue May 15, 2012 9:00 pm

What are the 2 enabled GPU's and what is the 3rd that you are turning on?
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Wenneker
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Joined: Mon Jun 02, 2014 4:12 pm

They're all gtx 780 ti cards.

It didn't matter which one I disabled.
Win 7 x64 | i7-4930 | 64gb | 4x gtx 780Ti 3gb
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FooZe
OctaneRender Team
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Joined: Tue May 15, 2012 9:00 pm

Do you have multi-gpu/SLI enabled? (If so please turn it off).
Does it happen on all scenes or just this one?
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Wenneker
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Posts: 111
Joined: Mon Jun 02, 2014 4:12 pm

It's just one scene. Might have something to do with the fact it's started in 1.x?

I have SLI enabled. Should I disable it on all the other machines aswell? Or is it just for debugging purposes?
Win 7 x64 | i7-4930 | 64gb | 4x gtx 780Ti 3gb
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FooZe
OctaneRender Team
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Joined: Tue May 15, 2012 9:00 pm

If you don't need it for gaming then yes, disable it on all machines.
Octane doesn't need it and sometimes it causes problems, so if you don't need it for anything else it may as well be turned off.
Does turning it off help with this scene?
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