Single GTX TITAN or Dual GTX 780Ti

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Single GTX TITAN or Dual GTX 780Ti

Postby aw1 » Sat Feb 15, 2014 11:44 pm

aw1 Sat Feb 15, 2014 11:44 pm
Kindly need help to decide which option to go for:
Single GTX TITAN or Dual GTX 780Ti?

TITAN has 2688 CUDA Cores and 6GB RAM and GTX780Ti has 2880 CUDA Cores and 3GB RAM
so my question is if i go for dual GTX780Ti, will octane use all the cores on both GTX780Ti cards? that is total 5760 CUDA Cores from dual cards?

really need this help to decide which way to go :)

Thanks in advance
Windows 7 Pro, i7 4770, 16 GB Ram, 1TB SSD, Asus GTX780Ti 3GB
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby gordonrobb » Sun Feb 16, 2014 1:23 am

gordonrobb Sun Feb 16, 2014 1:23 am
Yes, broadly speaking 2x780 will be over twice as fast, but with half the availabe VRAM.
Windows 8 Pro | i7 3770 OC | 32 GB Ram | Single Titan (plus Black Edition on Order) | Octane Lightwave |
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby aw1 » Sun Feb 16, 2014 6:12 am

aw1 Sun Feb 16, 2014 6:12 am
Thanks for your reply

GTX690 has 3072 CUDA Cores and 4GB RAM :) I am thinking about buying GTX690 but there is little confusion here, GTX690 specs show that it has 4096 MB (2048 MB per GPU) GDDR5 so does that mean Octane will recognize just 2GB of RAM on it? or full 4GB will be available?

thanks
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby lixai » Sun Feb 16, 2014 6:29 am

lixai Sun Feb 16, 2014 6:29 am
if it's dual GPU then always available ram will be half of what it says on the specs.
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby aw1 » Sun Feb 16, 2014 6:46 am

aw1 Sun Feb 16, 2014 6:46 am
Oh i see... then GTX780Ti is the good option i guess

thanks guys
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby lixai » Sun Feb 16, 2014 9:04 am

lixai Sun Feb 16, 2014 9:04 am
maybe you better wait for this
http://www.guru3d.com/news_story/6gb_ve ... anned.html

for me, i almost always use more than 3 gb (and even not all 3 gb are available on a 3gb card, a few hundred megs always gets lost or by the display, or any other reason)
i do complex exterior architectural scenes with many objects and textures.
If your work doesn't need complex scenes (studio shots of objects like jewerly, or any other single objects scene) than 3gb will get you there, but with more complex scenes (an also if you need big resolution renders, the bigger resolution, the more vram consumtion) you need more ram.

hope that helps a little.
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby aw1 » Mon Feb 17, 2014 5:19 am

aw1 Mon Feb 17, 2014 5:19 am
Thanks for your help lixai..
Yes I think 3GB is not gonna work because my scenes are getting bigger and bigger every day, specially architecture stuff and outdoors. I hope GTX780Ti 6GB version pops up soon within this month or so :)

Thanks
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby aw1 » Wed Feb 19, 2014 6:05 am

aw1 Wed Feb 19, 2014 6:05 am
GTX TITAN Black 6GB is out :)
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby vipvip » Wed Feb 19, 2014 7:48 am

vipvip Wed Feb 19, 2014 7:48 am
personaly, i own 2 x GTX 780 ti factory-overclocked, and im very satisfied with it: no power/heat problem ( 850 W alim ), 'human' price :) , noise reduced and 2.5x speed, compared to my old 2xGTX580 system...it's a very good compromise !
For the projects i currently work on, 3GB is enough but of course that's perhaps the only limitation ennoying, even if i didn't encountered many problems with it until now ( except with very large pictures rendering like A3+ 300dpi format )
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Re: Single GTX TITAN or Dual GTX 780Ti

Postby Tommes » Wed Feb 19, 2014 1:49 pm

Tommes Wed Feb 19, 2014 1:49 pm
What happens if you want to render ultra hires images? Is it still working, only segmented, or isn't it working at all?

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