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1) No idea - but I suspect the bang for the buck isn't there for Iray rendering. The latest Geforce cards (Titan X and GTX 980 TI) dropped 64-bit floting-point support which hasn't hurt Iray performance and the Geforce cards are noticibly cheaper than the Quadro.
2) Iray will use multiple cards for rendering, with caveats. a) the cards are run independently - the entire scene needs to fit in the vram of each card for the card to be used. b) SLI is NOT recommended for Iray. c) If your monitor (or monitors) are on one of the cards Iray is using for rendering your monitor(s) will get VERY laggy; to the point that Windows solitaire becomes unplayable (I suggest a cheap Geforce card for monitors only and one or more high-end cards for rendering - and you cannot mix Geforce and Quadro on the same system - driver issues).
There is a small list of programs that can use the special drivers and capabilities of a quadro, DAZ Studio is not one of them.
I use a 970 for rendering and a 730 for the screen. The 730 is significantly faster than my old PC (which had motherboard graphics) at navigating around large scenes, such as Stefan "Stonemason" Morrell's Streets of Old London.
Cheers,
Alex.
TY. I was leaning toward the 970.
P
I had a GeForce GT 430. I replaced it with a Quadro K4200 (based on the elbow I saw in $$$/core) but on the render benchmark I was still unhappy with my score. I just ordered a GeForce GT 980 Ti (EVGA SC+ AC2.0+).
I think I want to put the GT430 back in for display, and also have the GT 980Ti in so it's automatically selected for iRay renders. Hope this works. The k4200 is going on the market.
I'm trying to up grade an older mac pro 3,1. I had one evga gtx 680 in the machine and that helped with Iray renders in Daz Studio. I have a second 680 card and have successfully installed it and powered it with the assist of an external PSU. Is anyone else doing this? Is it even worth it or is most rendering speed a factor of CPU and Ram? And these cards are hefty and installed right on top of one another...I can only imagine they are going to get real hot really fast, but that is where the 16 lane pcie slots are (or would it make a lot of difference to put it in a higher 4-lane slot?). I welcome any advice.
Originally in my system I had 2 460's but 1 was pulled because my girlfriend's video card died. Then Daz came out with Iray, so I picked up a 970 and used my other 460 and the 970 (kept video on the 970 for gaming though)
Then I upgraded to windows 10 and could not get windows to play nice (it kept dissabling my 460 so it couldn't be used by Daz) so I pulled my other 460 and am left with only the 970. Still renders a lot faster than 3Delight and looks a ton better :)
The 980Ti is a great card for Iray.
When was this? NVidia released a driver update last week which was supposed to fix the problem where Win10 didn't like two cards. Might be worth putting the big card back in, updating from the NVidia site, then try again.
It was like wednessday of this week when I finally pulled it.
I tried everything. hiding the update for nVidia drivers and installing an older 460 driver, removing all the drivers and installing the newest one fresh, dissabling the 970 and got the 460 working, but as soon as I re-enabled the 970, the 460 was dissabled...
There's an ms app you can get from there site to list available windows updates and hide the ones you don't want windows to install, but when a newer driver is released, then it counts as a new update (so every time nvidia has an update, I would have to go into windows update and re-hide it)
Anyways, I never got it working so I pulled it. Windows 7 had 0 issues for me, windows 10 has enough that I'm on the fence about uninstalling it.