If you had $3K - 3 GTX Titan X -vs- 2 GTX Titan Z

[brasco]

Just to hammer another point home - TitanZ is Kepler, TitanX is Maxwell these are different architectures so saying it has "more cores" is totally irrelevant here.

So, as everyone has already said XXX all the way

cheers
brasc

[rappet]

Just to hammer another point home - TitanZ is Kepler, TitanX is Maxwell these are different architectures so saying it has "more cores" is totally irrelevant here.

So, as everyone has already said XXX all the way

cheers
brasc

not everyone...

Maxwell, Kepler, whatever... performance counts, no?
So favouring one card all depends.. depends on config build possibility.. i.e. can you add 4 GPU, 3 GPU, only two... depends on wanting one slot space between the cards... depends on having watercooling or aircooling.. and more.
If you would force me to explicitely favour one card, it still would be the Z!
I just prefer the winner in renderperformance and I like the one slot space between the cards when aircooling.. then the Z is a winner.
On watercooling you can space them together and you can add 4 Z's like you would add 4 X's.. Z is then still a winner on performance.
OK.. when you need the 12 vram, then the X is a winner, but that is not needed in 95-99% of the projects, is it?
So, my definite choice is a lot of Z's and one or few X for the 5-1% of the projects.

I ran a benchmark (PT, PT power 0.3, 8000 samples) during typing and this is the result of rendering with only X, and only Z in the same PC, so very very comparable!
X: 9.4 Ms/sec- duration 8:32sec
Z: 14,2 Ms/sec- duration 5:28sec

greetz,

[glimpse]

On watercooling you can space them together and you can add 4 Z's like you would add 4 X's.. Z is then still a winner on performance.

badly want to get that X & cut the balls out =) with single slot mod..Think I'll do some practice on my Black soon (already made mind to experiment on it =)

So in theory, playing a bit with tools, You can get TitanX as single slot card =) we've dreamed out with Smicha 'bout putting multile of those into some workstation motherboard allowing 7x cards =)

[rappet]

On watercooling you can space them together and you can add 4 Z's like you would add 4 X's.. Z is then still a winner on performance.

badly want to get that X & cut the balls out =) with single slot mod..Think I'll do some practice on my Black soon (already made mind to experiment on it =)

So in theory, playing a bit with tools, You can get TitanX as single slot card =) we've dreamed out with Smicha 'bout putting multile of those into some workstation motherboard allowing 7x cards =)

that's another ballgame

[glimpse]

yeah it's nuts..considering not everyOne is going to look this way (let's buy new card, disaseble & cut things out completelly voiding warranty =DDD

[brasco]

not everyone...

Maxwell, Kepler, whatever... performance counts, no?
So favouring one card all depends.. depends on config build possibility.. i.e. can you add 4 GPU, 3 GPU, only two... depends on wanting one slot space between the cards... depends on having watercooling or aircooling.. and more.
If you would force me to explicitely favour one card, it still would be the Z!
I just prefer the winner in renderperformance and I like the one slot space between the cards when aircooling.. then the Z is a winner.
On watercooling you can space them together and you can add 4 Z's like you would add 4 X's.. Z is then still a winner on performance.
OK.. when you need the 12 vram, then the X is a winner, but that is not needed in 95-99% of the projects, is it?
So, my definite choice is a lot of Z's and one or few X for the 5-1% of the projects.

I ran a benchmark (PT, PT power 0.3, 8000 samples) during typing and this is the result of rendering with only X, and only Z in the same PC, so very very comparable!
X: 9.4 Ms/sec- duration 8:32sec
Z: 14,2 Ms/sec- duration 5:28sec

greetz,

Absolutely, everyone has their own scenario.

However, this thread is asking about 2xTitanZ vs 3xTitanX in which they are the same price and you get the small bonus of 6GB with the Xs and they're faster. So, like you, I'd like to go where the performance is better which in this case is the 3 x TitanX.

If we were talking about a single Z vs single X and you were space limited, then it is a lot easier to say go for the Z.

cheers
brasc

[rappet]

...

Absolutely, everyone has their own scenario.

However, this thread is asking about 2xTitanZ vs 3xTitanX in which they are the same price and you get the small bonus of 6GB with the Xs and they're faster. So, like you, I'd like to go where the performance is better which in this case is the 3 x TitanX.

If we were talking about a single Z vs single X and you were space limited, then it is a lot easier to say go for the Z.

cheers
brasc

yeah, you are right, then I agree... theoretically
I 'forgot'about this theoretic exercise... coz' I am a practical guy
Nice thread to philosophy though.

[brasco]

That's not in theory though is it?

3x Titan X are faster than 2x Titan Z - In practise.

cheers
brasc

[rappet]

That's not in theory though is it?

3x Titan X are faster than 2x Titan Z - In practise.

cheers
brasc

I doubt that... doing some math on my benchmark recalculating the seconds it is appr the same,
and are 2 Z's bit faster (164 sec versu 170sec).
And this is in a case where they both have good space to breathe.

In practise stuffing them in my other case 780T with only 6slots on mobo.. then the two Z's have good air to breathe, and the triple X will be stuck together.. then the two Z's with breating space will perform better then triple X getting too hot.. that is my guess... I wish I could practice this by having triple X

So, again.. it all depends. If I only had this 780T case twith mobo 6slot..double Z is definitely favour.
In another build with enough space for triple X, the triple X would be preferable.

cheers,

[brasco]

I doubt that... doing some math on my benchmark recalculating the seconds it is appr the same,
and are 2 Z's bit faster (164 sec versu 170sec).
And this is in a case where they both have good space to breathe.

In practise stuffing them in my other case 780T with only 6slots on mobo.. then the two Z's have good air to breathe, and the triple X will be stuck together.. then the two Z's with breating space will perform better then triple X getting too hot.. that is my guess... I wish I could practice this by having triple X

So, again.. it all depends. If I only had this 780T case twith mobo 6slot..double Z is definitely favour.
In another build with enough space for triple X, the triple X would be preferable.

cheers,

Yeah, I agree, on air you'd definitely want space around the back of the cards, they draw air from the front to back, so they stack nicely I get ~5% temp increase on the middle card.

OctaneBench shows 2 TitanZs @ an average of 362% the 3 X's 382% so ~5% between them overall, would be nice to test that in a real scenario.
Can you throw me the benchmark scene you're using, I'll can run it on the 3xTitanX's, that way we could get a better real world idea of the difference.

cheers
brasc