GTX 1080 and vray RT

[oren]

hello

i have gtx 750ti

i want to buy the new gtx 1080 but what if i want the gtx 750ti for daily work (not preview ) and leave the gtx 1080 only for render work

like when im not tell him to render is stay off

sorry for Confusion and lack of knowledge

[glorybound]

I don't think RT will use both, so you plug your monitor in one and leave the better one for RT. Someone much smarter than I will chime in, but that is my understanding.

[oren]

that is what i want
to leave the older one the 750ti to handle with the ui and viewport and only the gtx 1080 will handle the render

i think i got the answer

[Sbrusse]

You can choose what card is used in the RT UI.


the * is pointing the cards that have a monitor attached, just uncheck it and you will be fine

[oren]

wowww
look at this list man!

i love it... can you share with us a video you record when you work on vray rt?
i cant find kind of this videos on the web

[Sbrusse]

I haven't recorded any video where I work, but I have a few animation renders on my youtube page just in case : https://www.youtube.com/user/sbrusse/videos

I had 7 cards but we needed to take some out to get them in some workstations.

[glorybound]

I didn't think RT can access the vram on more than one card at a time. Is the accurate?

[Deflaminis]

I didn't think RT can access the vram on more than one card at a time. Is the accurate?

What is the implication there? Does it still use the CUDA cores? I've got an extra graphics card in at home but maybe that was a pointless move on my part...

[Sbrusse]

I'm sorry I don't get any of the two questions really.
RT loads the scene in each card individually so the ram doesn't stack up.
In my case, I have 5 cards of 12 Gb, so the scene needs to fit in each of the 12 Gb of each card.
The more cards the faster as it scales "nearly" linearly, that's why I can with 5-7 Titan X get HD renders done in few minutes per frame.

Bobby (or anyone else), if you like to get any of your scenes tested through RT GPU and even make a small animation, just let me know, I'll be happy to run it

Cheers
Stan

[glorybound]

Okay, so a second 980ti would make sense for me. Ordering now.

[mitviz]

better to get the 1080 over a 980 ti

[glorybound]

it'll be a second 980ti. I already ordered it. I'll ave 12GB across both cards.

[glorybound]

I am trying to avoid headaches, so I didn't want to confuse things with a second type of card. I could sell my current card and get that one. I canceled my order, so I'll have to think about this some more.

[mitviz]

actually you cant add vram, so you only have 6 Gb stil, the 1080 is not only cheaper but faster and both work great together, i tested it with my friends 980 ti, i think since the 1080 came out everyone is trying to get rid of their 980 ti, i had an offer to get 3 used ones, only used 4 months for 300 usd each but made no sense

[Sbrusse]

Yes Bobby, I might have not been clear enough, the VRam doesn't stack up.
If a scene takes 7 Gb to render and you have 2 cards, one with 6 Gb and the other with 8, you will be able to render on the one with 8Gb as the 7Gb fits in, but it wont render on the 6Gb as it will not fit in the Ram of that card.
Like I said, I have 5x 12Gb, but that doesn't give me 60Gb, it only give me the ability to render scenes that will be up to 12Gb.

So the 1080 are the best as of today as they have 8Gb or if you dont want to spend as much, the 1070 is a good alternative as well as it also has 8Gb. Slower but also cheaper

Hope this make sense now.

Cheers