[Bf-cycles] Recent builds crashing - Cycles CUDA rendering

Le Jardin Digital contact at lejardindigital.fr
Tue Jan 10 14:15:06 CET 2012


Hi MIB
with the file from BA, i obtain the following scores:

on 1st machine, with Blender build 43239 and 53252 (cuda) ( w7600k @3.4GhZ, 16GB RAM, 2xGTX470, nvidia 285whql, win7 64):
* 35,82 secs with MULTIGPU ( 2x gtx470)
* 53,52 secs with 1 GTX470 ( whatever the pciexpress 4x or 16x)

There's something strange: *the rendered* *picture is black and white*

on the second machine, with Blender build 43098 (cuda) ( AMD 1090T @ 3.6 gHz, 6GB RAM, 1x GTX285 2gB, nvidia 285whql, win7 64):
* 2 min 27 secs
BUT *THE PICTURE IS COLORED* ( with light glow)

Another strange thing: when rendering with command line, *the new multigpu versions are very very slow *( much more than when hitting CTRL F12 )

last thing, does exist *a command ( command line rendering ) for specify what GPU we want to use *?

thanks




Wolfgang Fähnle a écrit :
> Hi, may it is a good idea to test with the file from BA to get comparable  
> results,
> if you have the time :).
> http://blenderartists.org/forum/showthread.php?239480-2.61-Cycles-render-benchmark
>
> Cheers, mib
>
>
>
>
> Am 10.01.2012, 09:18 Uhr, schrieb Le Jardin Digital  
> <contact at lejardindigital.fr>:
>
>   
>> Hi
>>
>> this morning, i replaced the GTX 285 with the GTX470 from my other
>> machine ( s o that the system has 2 x GTX470 ) and results are here:
>> render time: 8.03 secs ( 10.3 secs with only one ( the fastest GTX470 on
>> PCIe 16x) ):
>> Not 2x ( it is normal because of the PCI express speed different: 4x and
>> 16x) but a real gain this time !
>> You were right, Thomas, about the GTX of the same generation...
>> i didn't have the time actually to test other scenes but perhaps results
>> will be better (because this one has a lot of bitmap mapping...)
>> Thanks
>>
>>
>> Le Jardin Digital a écrit :
>>     
>>> Hi
>>>
>>> thanks for the info but apparently the 43233 build didnt' have this  
>>> option.
>>>
>>> Just intalled the last build 43239 and this one has this menu. But:
>>>
>>> when i choose 'GTX470 and GTX285', rendertime is 15.23 secs
>>> whith only GTX470 selected, it takes only 10.2 secs...
>>> sure it will be improvments for future versions... anyway thanks again
>>> for this exeptionnal work.
>>>
>>> regards
>>> Vincent
>>>
>>> my system: GTX470 1.3gb + GTX 285 2gb / win 64 / drivers nvidia 285 whql
>>>
>>> Thomas Dinges a écrit :
>>>
>>>       
>>>> Hey,
>>>> yes it's inside the User Preferences. Go to the system tab there, there
>>>> is the Compute Device setting.
>>>> Choose CUDA and then in the drop down beneath which card(s) to use.
>>>>
>>>> Regards,
>>>> Thomas
>>>>
>>>> p.s Please dont sent mails as html to this list, thanks!
>>>> _______________________________________________
>>>> Bf-cycles mailing list
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>>>> http://lists.blender.org/mailman/listinfo/bf-cycles
>>>>
>>>>
>>>>
>>>>         
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>>>
>>>       
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