Is this rig going to work well with IRAY ?
Wallflower
Posts: 35
Hello.
I just wanted to build a PC for IRAY, so i thought to ask for your opinions. This is what i have in mind to put together :
- 2x GTX 1080 TI
- Core i7 6800K
- G.SKILL RipjawsV DDR4 32GB (16GB x 2) 2400MHz CL15
- ADATA XPG SX930 SATA 6Gb/s SSD Drive 120GB
I appreciate any kind of help.
Daz 3D is part of 
Connect
DAZ Productions, Inc.
7533 S Center View Ct #4664
West Jordan, UT 84084
Licensing Agreement | Terms of Service | Privacy Policy | EULA
© 2024 Daz Productions Inc. All Rights Reserved.
Comments
I'd get an SSD at least twice that capacity. And of course you'll need more storage than that for all your content. I assume you'll also have hard drives in this machine. And a good MB and cooling and hefty PS.
I have SSD twice that and only 91GB is free even putting all my programs desktop and documents etc on my E drive!!!!
so yeah you definitely need a bigger one.
Thanks for your suggestions about the SSD. I'm still not sure about the CPU and RAM, but i think they're going to work fine. What you guys think about the GPU ? am i going to get a good result with them ?
well a 980ti and 16GB of RAM is enough for me so you should be fine
the CPU is not quite as important for iray rendering if your scenes fit on your card, the RAM helps loading the scene in the program.
I have programmes on my (non-SSD) C: drive and it currently has only 66GB of data on it (128GB free out of 194GB).
I've a second system with a 120 GB SSD with all programs installed on it (Libre Office, VLC, 7Zip, Winamp, PSP v7, Gimp, Epson Scanner and Abbyy fine reader OCR, assorted monitoring tools, SyncBack, some games, and a couple of utilities I can't think of at the moment) and I still have 90 GB free. My main system has a 512 GB SSD with all non-DAZ software on it as well as my Postgress database and swap file (pre-allocated) and it has about 350 GB of free space.
Having said that - I'd do at least a 256 GB C:: drive and have a 1 TB drive for all non-program files (content, videos, documentation - that sort of stuff).
Thanks for posting your opinions and experinces. I really appreciate it.
I'm thinking to go from 2x GTX 1080 TI to GTX 1080 TI + GTX 780 TI.
Since GTX 1080 TI has 11 GB of RAM and my scenes can be quite complicated so wether i use 2x GTX 1080 TI or GTX 1080 TI + GTX 780 TI, i can only achieve 11 GB of RAM because memory can't be shared, am i right ?
So now the only thing that matters is CUDA cores which i think is the most imprant thing in GPU rendering, right ?
CUDA Cores
GTX 1080 TI => 3584 GTX 780 TI => 2880
2x GTX 1080 TI => 7168 GTX 1080 TI + 780 TI => 6464
Difference => 704
Prices
GTX 1080 TI => $700 GTX 780 TI => $240
2x GTX 1080 TI => $1400 GTX 1080 TI + 780 TI => $940
Difference => $460
So my question is, do these 704 CUDA cores worth the price ? is this going to make a big difference ?
Please correct me if i mentioned any wrong information.
it will only use the memory of the lesser card too so you need two 6GB cards at least
So which one of these do you think is a better option. Since you have exprince with GTX 980 TI.
a GTX 1080 TI or 2x GT 980 TI 6GB.
well I only have experience with the 980ti no expert just know it only uses the lesser memory and actually did try my old 760 with it so saw for myself.
Thanks everyone.
This is the final rig. I decided to start with one GTX 1080 TI and see the result, then i'll decide if i want to add another one.
- GTX 1080 TI
- AMD RYZEN 1800X
- G.SKILL RipjawsV DDR4 32GB (16GB x 2) 2400MHz CL15
- ADATA XPG SX8000 PCIe Gen3x4 M.2 2280 Solid State Drive 256GB
Iray will use as much RAM as it needs, up to the point where there isn't enough on each card. If one card drops out due to lack of memory but another still has sufficient then the larger card will still be used.
Don't compare core count on cards from different generations, it isn't reliable except you know that core for core; each generation offers more per core versus older generation cards; how much better depends on what you're using the card for and maybe even the settings you have.
It is a great way of comparing cards of the same generatioin
I agree. It's only reliable if you test them separately on your desire softwares and see the result for yourself. You should consider many factors when you choose an hardware. Sometimes some shades can make a big different. That's why i choosed a 1080 TI over 2x 980 TI, and AMD RYZEN over Core i7, because it's a new generation and technology.
I'm not saying that the new ones are always better but they have a better chance.
My current 4 YO PC is becoming unstable and needs to be replaced. The 2 Video cards are slow anyway (GTS-450). I'm looking at building a Ryzen system as well. Most AM4 MBs are not in stock at the moment and the ones that are seem a bit cheap so I'm going to have to wait awhile. A New Egg support tech mentioned Radeon cards would work a little better for GPU rendering than Nvidia. On my wishlist right now is a Radeon GTR RX 480. I've never owned a Radeon before. Anyone have experience with this? Also, what speed RAM would you suggest with a RYZEN 7 1700 8-Core 3.0 GHz (3.7 GHz Turbo)? A 750W PS is on my wishlist. I would think that would be enough unless I decide to add another card down the road.
Radeons will not be used by Iray at all as they don't have CUDA support (an nVidia technology). They will be used by LuxRender, or anything else that uses OpenCL, but Iray (and Octane) don't.
Yeah I just heard about that from a friend on DA. Looks like I'll have to stick with Nvidia then. I'm not sure if I want to build an Intel or AMD CPU system. Will have to look at some prices and try to determine.
I used to have 2 GTX 970 and replaced one with a GTX 1080, I use the GTX 1080 for Iray rendering and have my 2 displays on the GTX 970. This way I can still use the computer during rendering. When I have both cards rendering, the computer is almost unuseable.
I would stick with 2 GTX 1080TI, as they both have 11 GB VRAM, if you mix the GTX 780TI with only 6 GB, it will often drop out and you will only be rendering with one 1080 TI GPU
Not for IRAY it wont.
... And to make a blanket statement like that shows how little, not how much, they know.
Don't skimp on your PSU; it is false-economy - it blows it can (although not likely) take other components with it.
IRAY rendering uses either CPU and/or GPU from Nvidia.
This will be an amazing rig. I am also planning on starting with two 1080 Ti's for my next rig. You'll basically render faster than most people on the planet.... (probably even rival my current quad-780 Ti setup).
One thing to keep in mind though, the i7-6800K only has 28 pci lanes, and the Ryzen only has 24. So they offer little in terms of expandability. If you want room to grow---that is, if you ever think you may add a third or fourth card---you may want to rethink your chip/mobo combo (in other words, stick to chips with 40 lanes and motherboards that can support up to 4 cards).
-P