So I was looking around for benchmarks and opinions on an sli 780 6GB vs just one titan black and I came across this article on Linus Tech Tips and in the comment section a lot of people were going off on the fact that "you can't use more than 3GB". What is all that shit about? Now when I say 780 6GB sli I don't mean 2 780's with 3GB, I mean the 6GB edition.
Check it out here http://linustechtips.com/main/topic/155906-titan-black-vs-780-6gb-sli/
Please educate me on why this is :)
From what I understand the Black splitsbthe 6gb between the two cores so 3gb per core.
That said I see no reason why two 6gb 780s will not be able to use all 6gb as each card has 6gb all to itself.
Super late edit: I was sleepy writing this so it makes no sense. Sorry I was thinking of the Titan Z and even the it makes no sense.
But the black would still be able to use all 6GBs right? or is it false advertising do you think? Did you see the comments over on linus' forum?
Titan black is a single GPU with 6 GB of vram, so it can utilize 6GB vram.
GTX-780 6GB sli also utilizes 6GB of vram. But is a 780 powerfull enough for workloads that ask upto 6GB Vram? thats kinda the question..
GTX-780 3GB sli can utilize 3GB of vram.
Titan Z is a dual GK110 on a single pcb, with 12GB of vram, but since this is an sli on a single pcb, it can only utilize 6GB of vram.
LTT has too much intel / Nvidia fanboys. lol ☺
Yes those cards can use all 6 gigs of Vram but if you are playing a game that is using more than say...4 or 5 gigs of Vram, you are not going to get good frame-rates even with SLI. The GPUs are just not powerful enough to process that texture information along with other post-processing. Framerates will slow to a crawl. 6 gigs of Vram on a titan is ok, since it isn't a gaming card, but any card with over 4 gigs of Vram for gaming is just pointless right now. Thats why a 780 Ti with a 3 gigs of Vram is fine.
What about for 4K though? How many 780s would it take to become powerful enough to use at least 4.5GB? haha
Hmm, so a Titan Black wouldn't bottleneck itself with that amount of vram? How do you think it would be in SLI?
Or how many 780s in SLI would it take to level out the bottle necking of the 6GB?
The main reason I go with Nvidia generally is because of some of the features that Geforce experience has. But I was thinking about 290xs in Crossfire.. What ones would be suitable for that and how many?
I'm basically just thinking about 4K gaming n stuff, that's why I'm interested in the high amounts of Vram, this would be quite an expensive upgrade though but I am fine with that. It probably won't happen until next year though, if it even happens.
The number of 780s is irrelevant due to SLI scaling difficulties. SLI scaling is on a very steep exponential decay proportional to number of GPUs. Thats why quad SLI builds are laughable since they are barely any better than Tri-SLI is is slightly better than Dual SLI which is quite a bit better than a single card.
IF SLI scaling was continuous, aka Dual SLI scaling continued across 3 and 4 way SLI, then I would say 3 780s would be powerful enough. As it is now...impossible. Maybe quad SLI but good luck getting it to actually work.
Yeah sorry I had my facts all sorts of wrong. I see no reason why it cannot use all 6gb all the time. The only thing I would put it down to if it is true is just Nvidia being weird and picky.
I had a bad feeling about that :( Maybe Crossfire 290xs? If I were to do multiple cards it would probably just be 2 anyway, maaaaaybe 3, but most likely not.
CrossfireX has shown better scaling at higher resolution than SLI, So if you are planning on doing 4K gaming, 2x290X would be the way to go.
Do you think 4GB would be enough for 4K? If I ever did buy this kind of setup I'd probably only be playing at med/high.
I think by the time 4K is main stream and used in gaming the GPUs will be far better. I don't really think many things are up to the task yet. Not many games made for it, almost no videos, GPUs can't keep up and not sure about the RAM limits yet.
Yes
I've been looking at benchmarks for 4K and SLI 780TIs are a couple frames faster in all the games, and since I already own one should I just stick with getting one more later? Instead of selling it and getting 2 290xs?
This depends on what your are doing really. With games because the cards are alternating the frames drawn all the cards in the stack need to have there frame buffer (vram) mirrored.
In some applications like IRay and VRay you can assign what core is doing what and address all the memory in the sli stack. So for a render app like this if you have to 2 cards with 6 gigs of vram then you have 12 gigs to work with. And also 2 processes to assign to different tasks.
On a side note I really hate that Nvidia has branded the Titan as a geforce card and tries to sell it to gamer's. It's dumb
Oh you have a Ti. Yes for sure you have a better set up that way. And a little room to overclock. I thought you where talking about the 780 and not the 780Ti. My bad
Here is a good comparison Linus did. https://www.youtube.com/watch?v=YqkI7bOfRkA
And Linus is no fan boy he says clearly what he dislikes. And I find him to be fair most of the time. The thing he does different that I like is he overclocks everything.
yeah well basicly all dual gpu´s like the titan Z are abit pointless for gaming to be honnest.
titan Z is 2 GTX780Ti´s on one pcb, with 12GB of vram, but in gaming you can only utilize 6GB. The price of that card is also rediculous.
Sorry wrong video. I assumed it was this one. https://www.youtube.com/watch?v=aC1SsnS6naA