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Dual 2080TIs or one Titan?

asdf123asdf123 Posts: 167
in The Commons
My scenes won't be massive, so I believe 2080 TIs will be the better option to speed up renders, correct?

Comments

  • AelfinMaegikAelfinMaegik Posts: 47
    edited July 2019

    based on the benchmark threads, two 2080ti cards look like they are better than a titan

    Post edited by AelfinMaegik on
  • kenshaw011267kenshaw011267 Posts: 3,805

    RTX Titans have only a little more CUDA than a single 2080ti, 4608 vs. 4352. So 2 2080ti will render signifigantly faster than an RTX Titan assuming the scene fits in 11Gb.

  • asdf123asdf123 Posts: 167
    kenshaw011267 said:

    RTX Titans have only a little more CUDA than a single 2080ti, 4608 vs. 4352. So 2 2080ti will render signifigantly faster than an RTX Titan assuming the scene fits in 11Gb.

    Thanks! Can anyone point to benchmarks comparing one vs two 2080 TI?
  • asdf123asdf123 Posts: 167
    AelfinMaegik said:

    based on the benchmark threads, two 2080ti cards look like they are better than a titan

    Thanks! I believe you're running dual 2080 TI, yes? Any chance you have benchmarks with one vs two?
  • JamesJABJamesJAB Posts: 1,766

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

  • outrider42outrider42 Posts: 3,679
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

    That is assuming Nvlink works with Iray. I'm not sure if we have seen anyone confirm it does, I would love to know myself.

    But I do know it would not be 22GB, some data has to be duplicated on both cards, so you will not get double VRAM. But if it does work, it would certainly exceed the 11GB a single 2080ti has.

    The main benefit to the Titan is it has 24GB of VRAM on a single card. It has a few other perks, but they don't really apply to Iray. So unless you need a lot of VRAM the 2080ti's would be the way to go.

    BTW, running Nvlink enabled does cause a minor performance penalty, too. Its not huge, but if the scene is small enough to fit on one card, then disabling Nvlink will allow it render faster. Then when you do need more than 11GB VRAM you can enable Nvlink for the larger scenes. Again, this is all assuming that Nvlink actually works. Nvlink is only for pooling VRAM when needed, otherwise leave it off.

  • asdf123asdf123 Posts: 167
    edited July 2019
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

    outrider42 said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

    That is assuming Nvlink works with Iray. I'm not sure if we have seen anyone confirm it does, I would love to know myself.

    But I do know it would not be 22GB, some data has to be duplicated on both cards, so you will not get double VRAM. But if it does work, it would certainly exceed the 11GB a single 2080ti has.

    The main benefit to the Titan is it has 24GB of VRAM on a single card. It has a few other perks, but they don't really apply to Iray. So unless you need a lot of VRAM the 2080ti's would be the way to go.

    BTW, running Nvlink enabled does cause a minor performance penalty, too. Its not huge, but if the scene is small enough to fit on one card, then disabling Nvlink will allow it render faster. Then when you do need more than 11GB VRAM you can enable Nvlink for the larger scenes. Again, this is all assuming that Nvlink actually works. Nvlink is only for pooling VRAM when needed, otherwise leave it off.

    Thanks, guys!! Very helpful
    Post edited by asdf123 on
  • JamesJABJamesJAB Posts: 1,766
    newoski said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

     

    outrider42 said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

    That is assuming Nvlink works with Iray. I'm not sure if we have seen anyone confirm it does, I would love to know myself.

    But I do know it would not be 22GB, some data has to be duplicated on both cards, so you will not get double VRAM. But if it does work, it would certainly exceed the 11GB a single 2080ti has.

    The main benefit to the Titan is it has 24GB of VRAM on a single card. It has a few other perks, but they don't really apply to Iray. So unless you need a lot of VRAM the 2080ti's would be the way to go.

    BTW, running Nvlink enabled does cause a minor performance penalty, too. Its not huge, but if the scene is small enough to fit on one card, then disabling Nvlink will allow it render faster. Then when you do need more than 11GB VRAM you can enable Nvlink for the larger scenes. Again, this is all assuming that Nvlink actually works. Nvlink is only for pooling VRAM when needed, otherwise leave it off.

     

    Thanks, guys!! Very helpful

    No!
    NVLink and SLI are not the same.
    SLI is just for syncing the cards so they can render alternating frames in video games for a higher frame rate.
    NVLink is a high speed interconnect between the cards to pass data back and forth without clogging up your PCI-e lanes. (On the RTX 2080 ti I believe it's 100GB per second)

  • asdf123asdf123 Posts: 167
    edited July 2019
    JamesJAB said:
    newoski said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

     

    outrider42 said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

    That is assuming Nvlink works with Iray. I'm not sure if we have seen anyone confirm it does, I would love to know myself.

    But I do know it would not be 22GB, some data has to be duplicated on both cards, so you will not get double VRAM. But if it does work, it would certainly exceed the 11GB a single 2080ti has.

    The main benefit to the Titan is it has 24GB of VRAM on a single card. It has a few other perks, but they don't really apply to Iray. So unless you need a lot of VRAM the 2080ti's would be the way to go.

    BTW, running Nvlink enabled does cause a minor performance penalty, too. Its not huge, but if the scene is small enough to fit on one card, then disabling Nvlink will allow it render faster. Then when you do need more than 11GB VRAM you can enable Nvlink for the larger scenes. Again, this is all assuming that Nvlink actually works. Nvlink is only for pooling VRAM when needed, otherwise leave it off.

     

    Thanks, guys!! Very helpful

    No!
    NVLink and SLI are not the same.
    SLI is just for syncing the cards so they can render alternating frames in video games for a higher frame rate.
    NVLink is a high speed interconnect between the cards to pass data back and forth without clogging up your PCI-e lanes. (On the RTX 2080 ti I believe it's 100GB per second)

    Awesome, thanks for clarifying. New related question. It sounds like Octane renderer doesn't need as beefy a GPU setup. Would one 2080 TI + lifetime Octane license be a better route? Or would Octane subscription + dual 2080 TI be better?
    Post edited by asdf123 on
  • RayDAntRayDAnt Posts: 1,162
    newoski said:
    My scenes won't be massive, so I believe 2080 TIs will be the better option to speed up renders, correct?

    Titan RTX owner reporting in - yes, if speed is your goal two 2080Tis will be very nearly double what I have. Only go the Titan RTX route if scene sizes matter more (they did for me - hence why I got a Titan RTX.)

    In theory, two 2080Ti's are able to come pretty close in scene capacity to a single Titan RTX via memory pooling. However the only way to get this working at the moment requires expensive NVLink bridges, a monthly subscription to Iray Server, and switching your primary rendering computer over to Linux. Which obviously isn't gonna be everyone's cup of tea.

  • kyoto kidkyoto kid Posts: 42,159
    newoski said:
    JamesJAB said:
    newoski said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

     

    outrider42 said:
    JamesJAB said:

    The other advantage to usiging 2 RTX 2080 ti cards is NVLink!

    This will allow the two cards to pool resources and act as 1 22GB GPU provided that the new RTX comaptible verion of DAZ Studio uses NVLink.

    That is assuming Nvlink works with Iray. I'm not sure if we have seen anyone confirm it does, I would love to know myself.

    But I do know it would not be 22GB, some data has to be duplicated on both cards, so you will not get double VRAM. But if it does work, it would certainly exceed the 11GB a single 2080ti has.

    The main benefit to the Titan is it has 24GB of VRAM on a single card. It has a few other perks, but they don't really apply to Iray. So unless you need a lot of VRAM the 2080ti's would be the way to go.

    BTW, running Nvlink enabled does cause a minor performance penalty, too. Its not huge, but if the scene is small enough to fit on one card, then disabling Nvlink will allow it render faster. Then when you do need more than 11GB VRAM you can enable Nvlink for the larger scenes. Again, this is all assuming that Nvlink actually works. Nvlink is only for pooling VRAM when needed, otherwise leave it off.

     

    Thanks, guys!! Very helpful

    No!
    NVLink and SLI are not the same.
    SLI is just for syncing the cards so they can render alternating frames in video games for a higher frame rate.
    NVLink is a high speed interconnect between the cards to pass data back and forth without clogging up your PCI-e lanes. (On the RTX 2080 ti I believe it's 100GB per second)

     

    Awesome, thanks for clarifying. New related question. It sounds like Octane renderer doesn't need as beefy a GPU setup. Would one 2080 TI + lifetime Octane license be a better route? Or would Octane subscription + dual 2080 TI be better?

    ...Octane's Out of Core rendering splits the load between the GPU & CPU/system memory, so it would be good to have a decent fast multi thread CPU as well,  As I understand it isn't quite as fast as rendering with dual matched GPUs but still a much faster than having having everything dump to he CPU.  You can give Octane a try as they do have a subscription track for 20$ a month (don't have to commit to the full cost of the engine + plugin which is 579$ for the single workstation licence without the All Access option)

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