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GPU Choices for IRay

GreyManGreyMan Posts: 20
in The Commons

Hello everybody.

This is my first post on this forum and please forgive my spelling/grammar(spellcheck is missing for some reason) blush  I am starting out in IRay and I want to buy a GPU or two. On my budget I can afford 2x 1050 ti 4GB or 1x 1060 3GB. Cuda core wise the 2x 1050's will give me 1536 cores vs the 1060's 1152. Price wise one 1060 is cheaper than 2x 1050ti's. Is the 3gb of the 1060 a problem and is the 4GB enough on the 1050ti's. I cant find stock of the 1060 6Gb (1280 cuda cores) version at this moment. This is a old pc I am resurecting from the dead for my daz hobby. Its a AMD Fx8150 8 core on a gigabyte 990fxa-ud7 MB and a 750W PSU. The board supports 4 8xPCI-E slots plus a 4x slot. So with time, eventually there will be 4 GPU's for rendering only. The 4x will drive an old 550ti for the displays.

Any advise will be appreciated.

Comments

  • JamesJABJamesJAB Posts: 1,760

    I would wait for a GTX 1060 6GB card to become avaliable.  With the way multiple GPU stacking works with Iray you do not get double the performance from 2 cards (more like an extra 60 - 70% performance from the second card) You would get about the same performance with two GTX 1050 ti cards as with one GTX 1060 6GB.  The issue there is that you would be stuck with 4GB of ram.  I'm running a 6GB GTX 1060 and I am always very aware of VRAM usage because even 6GB isn't enough in moderately complicated scenes with multiple characters.

    Honestly though if you are patient, save up for an 8GB GTX 1070 or 1080.  You will thank yourself in the long run.

    One thing to keep in mind is that with the release of the new generation AMD cards, they are keeping up with the 1070 and 1080 while selling at a substatialy lower price.  This should lead to a bit of a price war (hopefully).

  • GatorGator Posts: 1,294

    Yeah I'd save up for a 8 GB 1070 or 1080 too.  3 GB is woefully little nowadays, same with 4 GB.

    What's your use?  If it's just pinups of one gal or simple things on a plain background you can get away without, otherwise you're going to be wanting more.

  • ebergerlyebergerly Posts: 3,255
    edited August 2017
    Looks like there are a ton of 1060s available in the $250 range on newegg. A 1070 costs almost twice as much, and according to the DAZStudio benchmark thread will give about a 33% improvement in render time (4.5 minutes vs 3 minutes). A 1080 costs not much more than the 1070 (maybe $550 vs $500) and will give another incremental improvement. The issue of VRAM on the GPU is important. If you use the graphics card to run your monitors then Windows will grab a big chunk of that. My 1070 powers 3 monitors and W10 makes 2GB of the 8GB unavailable
    Post edited by ebergerly on
  • GreyManGreyMan Posts: 20

    Thanks so much for the advise.

     

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