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  1. #61
    Scotchtapeworm impressive time, by the way on my new 750 ti , and I7 870, 16 Gb RAM:
    cornell_bench: 3:00:04 (Default Settings) ,
    the same time on 2.69 and 2.70 Rolf's version. on the latest version it does not work( although I copied sm_ 50 kernel )



  2. #62
    Hi, it's an interesting work you're doing here.

    I tried my GTX 750ti (2GB MSI OC) with i5-4670 and 8GB RAM
    Mike Pan's BMW (default) 01:00.49
    Mike Pan's BMW (256x256) 00:59.46
    Cornell Box (default) 02:58.81

    I used 2.70a with sm_50 kernel for the testing



  3. #63
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    My GTX570 died, so i get a another 750ti.
    I get back to 2.69.11 for now, the rendertimes are worse on recent builds for me(80s for BMW). And with two GPUs i get only a speedup around ~33%.
    On 2.69.11 i get a speedup near 100%.
    I've render the Caterpillar Scene on 2.69.11 eb4f2b4 with SSS enable, for only this render i used 3x750ti. yes 3x.
    And this is the result:

    00h 56m 12s
    Click image for larger version. 

Name:	Caterpillar_ori.jpg 
Views:	134 
Size:	244.9 KB 
ID:	303426

    Full Resolution:
    https://www.dropbox.com/s/k520p42mda...pillar_ori.png

    In 2.69.11 with one GPU i get times around 2h 40m.
    With newest 2.70.2 i can't beat 2h 40m even if i use 2 GPU's
    Last edited by Rolf; 17-Apr-14 at 19:27.



  4. #64
    Originally Posted by Crus-T View Post
    Hi, it's an interesting work you're doing here.

    I tried my GTX 750ti (2GB MSI OC) with i5-4670 and 8GB RAM
    Mike Pan's BMW (default) 01:00.49
    Mike Pan's BMW (256x256) 00:59.46
    Cornell Box (default) 02:58.81

    I used 2.70a with sm_50 kernel for the testing
    Almost exactly the same result here on exactly the same card in Win8.1.
    Mike Pan's BMW (256x256): 00:59.27

    I was a little miffed that the CUDA rendering didn't work out of the box in Windows (since it did under Linux, though twice as slow). Will the newer sm_50 kernel be supplied with Blender in the future to save others the frustration of hunting this fix down?

    EDIT: Thanks to Juicyfruit's sm_50 linux kernel, I've halved my linux BMW benchmark from 2:10, to 1:04(!) with 256x256 tiles, but Windows 8.1 is still slightly faster at 59.XX seconds. Still beats my CPUs best case time of 1:48 (with 8x8 tiles), so now I can default to GPU rendering.
    Last edited by farrellj; 18-Apr-14 at 21:16.



  5. #65
    Originally Posted by Juicyfruit View Post
    I have also compiled sm_50 kernels for release (both 32 bit and 64 bit)

    windows http://martijnberger.nl/file/2.70_sm50.zip

    linux http://martijnberger.nl/file/2.70_sm50.tar.gz

    extract into 2.70\scripts\addons\cycles\lib\ windows
    Where do you put it for linux? There is no "lib" folder. I created one in the cycles dir and put it there but that didn't work.



  6. #66
    Originally Posted by Tigerlore View Post
    Where do you put it for linux? There is no "lib" folder. I created one in the cycles dir and put it there but that didn't work.
    You're right that the linux distro-packaged version of blender might not have a cycles lib dir, as mine doesn't either in Fedora 20. Perhaps it's a closed-source legal issue?

    Code:
    $ find /usr/share/blender/2.69/ -iname '*cubin*'
    $ sudo yum provides \*cycles/lib\*
    Loaded plugins: changelog, langpacks, refresh-packagekit
    No matches found
    However, the version of blender downloaded directly from blender.org does include it, and it's the one I use most often anyway because it's usually more up-to-date than the packaged version:

    Code:
    $ find ~/bin/blender-beta/blender-2.70a-linux-glibc211-x86_64 -name 'kernel_sm*'
    /home/jaf/bin/blender-beta/blender-2.70a-linux-glibc211-x86_64/2.70/scripts/addons/cycles/lib/kernel_sm_30.cubin
    /home/jaf/bin/blender-beta/blender-2.70a-linux-glibc211-x86_64/2.70/scripts/addons/cycles/lib/kernel_sm_21.cubin
    /home/jaf/bin/blender-beta/blender-2.70a-linux-glibc211-x86_64/2.70/scripts/addons/cycles/lib/kernel_sm_35.cubin
    /home/jaf/bin/blender-beta/blender-2.70a-linux-glibc211-x86_64/2.70/scripts/addons/cycles/lib/kernel_sm_20.cubin
    /home/jaf/bin/blender-beta/blender-2.70a-linux-glibc211-x86_64/2.70/scripts/addons/cycles/lib/kernel_sm_50.cubin



  7. #67
    Originally Posted by farrellj View Post
    However, the version of blender downloaded directly from blender.org does include it, and it's the one I use most often anyway because it's usually more up-to-date than the packaged version:
    Thank you so very much, you saved me! I had tried everything I could possibly think of: different OS's, different cuda versions, drivers, I compiled it - I don't know how many times. Now, it works and it was pretty simple.



  8. #68
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    Hi,

    Can someone please upload the 2.69.11 Win64 build again?
    Rolf says the newest builds are much slower, especially with two cards, but he removed the old builds from his dropbox.

    Guess who has just placed an order for two 750 ti ’s?
    ;-)



  9. #69
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    Originally Posted by Tibi View Post
    Hi,

    Can someone please upload the 2.69.11 Win64 build again?
    Rolf says the newest builds are much slower, especially with two cards, but he removed the old builds from his dropbox.

    Guess who has just placed an order for two 750 ti s?
    ;-)
    Here my build, i use primary.
    Blender 2.69.11 eb4f2b4
    http://goo.gl/c2cjtF

    on newer build, the utilization of 2 or more 750tis look like this =>
    Name:  gpu_load1.jpg
Views: 1919
Size:  22.0 KB

    I don't know if the problem exist just for me or for everyone.
    Last edited by Rolf; 29-Apr-14 at 11:06.



  10. #70
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    Thanks a lot Rolf!

    I’ll test both builds once my cards arrive and post the results here.
    Note: for this 2.69.11 build to run, I had to replace the 2.69.11 directory by its subdirectory 2.69.

    viele Gre
    Last edited by Tibi; 29-Apr-14 at 11:26.



  11. #71
    Originally Posted by Tigerlore View Post
    Where do you put it for linux? There is no "lib" folder. I created one in the cycles dir and put it there but that didn't work.
    mkdir /usr/share/blender/2.70/scripts/addons/cycles/lib <-- This worked on mine.. don't know why it didn't work for you.



  12. #72
    GTX 750 1GB DDR 5 (not TI) <-- yes the el cheapo card.

    Using Juicy/or ROLF sm_50 kernel with blender 2.70a stabel compiled from source @ Gentoo 64Bit.

    Mike BMW Pan (default) 1min 22 secs
    Mike BMW Pan (tile 256X128) 1:13 secs

    Corrnell Blend (default) 2min 41 secs.



  13. #73
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    Official Windows Blender versions are now created with Cuda 6.0 and come with sm_50 kernel for Maxwell Cards.

    http://builder.blender.org/download/



  14. #74
    Thanks for the information, Rolf.
    Official Windows Blender 2.70-685316b win8 x64 version tested and working here with 750ti.
    For the moment, no 'subsurface scattering and volume scatter/absorption' supported on gpu render.
    For that, your 'special sm_50 kernel', thankfully.



  15. #75
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    Someone (nickname Cycliste) on the French Blender Clan Forum made a quite interesting test using 6 (yes six) 750 Ti cards and comparing it to the more expensive Titan:

    http://blenderclan.tuxfamily.org/htm...topic_id=41732

    Even if you don’t read French you might like to have a look at his rig and the test results.
    Last edited by Tibi; 02-May-14 at 02:44.



  16. #76
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    yes but it 2gb vs 6gb VRAM. very good for mining



  17. #77
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    I test the Cavalier scene in 2.69.11.
    With 1 card i get 14:45.41
    With 2 cards i get 7:34.43, so i beat a titan with only 2 of them.
    The Time of 3:29 with 6x 750ti in 2.69.11 seems slow for me.



  18. #78
    Originally Posted by reC View Post
    yes but it 2gb vs 6gb VRAM. very good for mining
    Those cards are CUDA 6 capable, what about unified memory ?



  19. #79
    Originally Posted by Rolf View Post
    I test the Cavalier scene in 2.69.11.
    With 1 card i get 14:45.41
    With 2 cards i get 7:34.43, so i beat a titan with only 2 of them.
    The Time of 3:29 with 6x 750ti in 2.69.11 seems slow for me.
    I think those are not OC cards. If you tested the scene with the nice OC you mentioned earlier it could be an explanation.



  20. #80
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    Well, I get 12:04.63 with 2 OC cards, so YMMV
    But I had the display plugged to one of them, and I was clicking around.
    I also had GPU-Z started (twice) and it showed GPU load oscillating, a bit like on your lower chart in post #69, but I’m using 2.69.11



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