Will increase of the memory from 8GB to 16 GB speed up the rendering speed?

Comments

• IsaacNewton Posts: 1,300

  January 2019

  Do you mean normal RAM or Video RAM?

  Memory limitations will only slow your render down if the whole scene cannot fit into the available memory. Having multiple GPUs does not currently multiply your memory space, since the whole scene must fit in to each GPU memory.
• handel_035c4ce6 Posts: 482

  January 2019

  I mean normal RAM.
• dawnblade Posts: 1,723

  January 2019

  Unfortunately no. From this article, CUDA cores in an Nvidia GPU contribute to the speed of an Iray render.
• kenshaw011267 Posts: 3,805

  January 2019

  If you render with 3delight increasing system RAM will help some. If you routinely drop to CPU in iRay then adding RAM will also help a little. There are other render engines that are plugins that increasing RAM would help but you'd know about that if you had the plugins.
• handel_035c4ce6 Posts: 482

  January 2019

  What i am experiencing right now (GPU render)

  The render is limited by time but what matters is the number of passes (itterations or whatever they were called). I have relaively big (for Daz) scene with ~25 props, ~30 tree instances, and 3 human figures. I am framing a little part of it with only 1 figure, some instances and some props. And the renderer makes about 100 passes per hour. If I make the stuff outside the frame invisible, the number of passes didn't increase significantly (didn't try what will happen if I make them "rendered off" from the options). When I deleted the stuff outside the camera frame the renderer was making more then 600 passes per hour.

  That's why I am wondering is there a way to boost the renderer speed with small investments (trying to upgrade a very outdated PC is just a waste of money and I don't want to buy a new one as the old one is still more or less sufficient).
• kenshaw011267 Posts: 3,805

  January 2019

  1) Buy Scene Optimizer from the Daz shop if you haven't already.

  2) Consider buying a used GPU on eBay or Craigslist. 8Gb is running about $50 last I checked. You might be able to get a 960 or something like that on the used market for that.

  3) I assume you know you can increase the length of time a render will run from the default 2 hours but just in case, you can. It's part of the render settings.

  4) Adding a new GPU to an old PC, assuming you have the power supply to support it, isn't a waste of money. You can use the GPU until you get the money for the rest of a new system and then just move it to the new system.
• handel_035c4ce6 Posts: 482

  January 2019

  LOL... It is easy to forget about the existing of the second hand market:-)

  I read the description of the Scene Optimizer. Isn't this too much hassle with each scene? Isn't it much faster to simply delete the unused stuff?
• frankrblow Posts: 2,052

  January 2019

  handel_035c4ce6 said:

  LOL... It is easy to forget about the existing of the second hand market:-)

  I read the description of the Scene Optimizer. Isn't this too much hassle with each scene? Isn't it much faster to simply delete the unused stuff?

  Scene Optimizer does a lot more than just deleting stuff. It will reduce texture sizes, a little or a lot, depending on your selection, and that can have a massive effect on render times: minutes instead of hours, hours instead of days, and even allow you to render scenes that normally would make Studio crash.

  True, you could do this manually, by reducing texture sizes in an image editor, but when you are talking about hundreds of textures per scene, that's not saving you time, is it?

  I highly recommend Scene Optimizer, especially when it's on sale.
• kenshaw011267 Posts: 3,805

  January 2019

  Plus deleting stuff means no reflections which effects the stuff visible on camera. Better to use scene optimizer to reduce texture size. virtually everything recent comes with 4k textures which you almost definitely don't need so cutting every texture in half or by 4 will greatly reduce the amount of VRAM used which will let the scene fit on your graphic card and also speed up your renders.
• handel_035c4ce6 Posts: 482

  January 2019

  kenshaw011267 said:

   

  2) Consider buying a used GPU on eBay or Craigslist. 8Gb is running about $50 last I checked. You might be able to get a 960 or something like that on the used market for that.

  Do you mean GTX 960? I don't see GTX 960 with more then 4 GB at all?
• kenshaw011267 Posts: 3,805

  January 2019

  Yes, GTX 960. For $50 that's about what you can expect.