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Is 1275w PSu Enought for tri-Sli gtx 780ti ?

Last response: in Systems
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July 16, 2014 7:55:29 AM

Hi everyone,

Here is my config:


i7 4770k
Corsair h100i Waterbloc
msi z87 Xpower
Kingston hyperX 2*8GB (16) 2133MHZ
TRI-SLI msi gtx 780ti gaming
SSD 180gb corsair Gs
HDD 500gb
200cm Led NZXT

Power Supply that i wont to by according to my budget is the THERMALTAKE TOUGHPOWER XT 1 275W , w'll it be Enought ? thx guys

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a b ) Power supply
a b Î Nvidia
a c 94 U Graphics card
July 16, 2014 8:01:55 AM

recommended psu for 2x GT 780 ti is 850W Gold

i believe 1200W is more than enough for 3x
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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 8:03:18 AM

Yes; that is enough, although, I don't recommend any setup above 2-way SLI.
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July 16, 2014 8:03:23 AM

Thats more then enough.
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July 16, 2014 8:08:52 AM

thank you guys, i really appreciate it !!
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July 16, 2014 8:11:32 AM

ksham said:
Yes; that is enough, although, I don't recommend any setup above 2-way SLI.


for 1080p ? or just because tri-sli are not optimised in mot of the games on nvidia's driver ?
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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 8:14:08 AM

Both. You don't need it for 1080p and the performance gain is not worth it. Scaling above 2-way SLI is terrible. A lot of money and a lot of heat output for very little gain.

For 1080p, a single GTX 780 Ti is fine. SLI is passable, but 3-way is definitely not worth it. Any games currently out right now that cannot play to your settings on 2-way SLI isn't going to be doing much better in 3-way. For the record, I don't know of any games that will fail to play on GTX 780 Ti SLI @1080p.
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a b U Graphics card
July 16, 2014 8:17:04 AM

MelodSpark said:
ksham said:
Yes; that is enough, although, I don't recommend any setup above 2-way SLI.


for 1080p ? or just because tri-sli are not optimised in mot of the games on nvidia's driver ?


If you want to run 3 of those, I hope you're at 5760x1080 and not literally playing on a single 1080p screen, in which case you're overspending massively.
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July 16, 2014 8:30:21 AM

DSzymborski said:
MelodSpark said:
ksham said:
Yes; that is enough, although, I don't recommend any setup above 2-way SLI.


for 1080p ? or just because tri-sli are not optimised in mot of the games on nvidia's driver ?


If you want to run 3 of those, I hope you're at 5760x1080 and not literally playing on a single 1080p screen, in which case you're overspending massively.



1080p for the moment, but i'm planning for a 1440p soon !!
i know that all games are playable on ultra 60fps, except MetroLL on some Places ...But i'm thinking for the new upcomming games witch w'll be extra Gpu demanding and probably Cpu too, like the witcher3 and AC Unity according to the tesselation and anti-aliasing level !!

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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 8:32:46 AM

Future-planning is usually a poor idea. But if you have no qualms on spending all that money on a setup that MAY fail, then feel free. :p  Otherwise, I would advice that you wait and see how demanding the games are and if the setup will be efficient before doing SLI on those games.
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July 16, 2014 8:38:29 AM

AMD Radeon said:
SLI scaling past dual card doesnt always work as expected

it is just an example
http://www.tomshardware.com/reviews/geforce-gtx-760-vs-...


yes i agree but not in all games !! and notice that all test are realised with Vsync disabled... or with this new drivers enabling Vsync improve performance for 60fps
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a b U Graphics card
July 16, 2014 8:38:48 AM

MelodSpark said:
DSzymborski said:
MelodSpark said:
ksham said:
Yes; that is enough, although, I don't recommend any setup above 2-way SLI.


for 1080p ? or just because tri-sli are not optimised in mot of the games on nvidia's driver ?


If you want to run 3 of those, I hope you're at 5760x1080 and not literally playing on a single 1080p screen, in which case you're overspending massively.



1080p for the moment, but i'm planning for a 1440p soon !!
i know that all games are playable on ultra 60fps, except MetroLL on some Places ...But i'm thinking for the new upcomming games witch w'll be extra Gpu demanding and probably Cpu too, like the witcher3 and AC Unity according to the tesselation and anti-aliasing level !!



Even single 1440p, three is complete overkill. It's your money, of course, but you're spending at least $700 (and arguably $1400) for very little marginal value.

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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 8:47:08 AM

Wrong. Enabling vsync would normally reduce FPS and performance. All vsync does is prevent screen tearing, so with that extra processing, there is performance penalty even though the overall experience is better to the end user.
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July 16, 2014 8:49:11 AM

DSzymborski said:
MelodSpark said:
DSzymborski said:
MelodSpark said:
ksham said:
Yes; that is enough, although, I don't recommend any setup above 2-way SLI.


for 1080p ? or just because tri-sli are not optimised in mot of the games on nvidia's driver ?


If you want to run 3 of those, I hope you're at 5760x1080 and not literally playing on a single 1080p screen, in which case you're overspending massively.



1080p for the moment, but i'm planning for a 1440p soon !!
i know that all games are playable on ultra 60fps, except MetroLL on some Places ...But i'm thinking for the new upcomming games witch w'll be extra Gpu demanding and probably Cpu too, like the witcher3 and AC Unity according to the tesselation and anti-aliasing level !!



Even single 1440p, three is complete overkill. It's your money, of course, but you're spending at least $700 (and arguably $1400) for very little marginal value.


maybe for 4k resolution ...it's all depending how demanding games w'll be !! i'm a really enjoying games on 60
fps like most of you
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July 16, 2014 8:51:42 AM

ksham said:
Future-planning is usually a poor idea. But if you have no qualms on spending all that money on a setup that MAY fail, then feel free. :p  Otherwise, I would advice that you wait and see how demanding the games are and if the setup will be efficient before doing SLI on those games.


thx bro, but hardware already here and instaled, just waiting for the psu , You know what i w'll give you some results with some walkthrought ;) 
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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 8:52:37 AM

MelodSpark said:
maybe for 4k resolution ...it's all depending how demanding games w'll be !! i'm a really enjoying games on 60
fps like most of you

That is why I suggest that you wait and see before taking such drastic measures. Games do not become that demanding overnight. And you don't need SLI setup now, and especially not 3-way SLI. Just sit back and wait. There will be better graphics cards in the future. SLI is not the only way to increase performance.

Edit: well ... if you already bought them ...
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July 16, 2014 8:57:04 AM

ksham said:
Wrong. Enabling vsync would normally reduce FPS and performance. All vsync does is prevent screen tearing, so with that extra processing, there is performance penalty even though the overall experience is better to the end user.



go to your Nvida Panel and see the option on bottom, when this option enabled, and also vsync enabled, thtat improve performance, and i'm speaking for Sli configuration
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a b U Graphics card
July 16, 2014 9:03:50 AM

MelodSpark said:
ksham said:
Wrong. Enabling vsync would normally reduce FPS and performance. All vsync does is prevent screen tearing, so with that extra processing, there is performance penalty even though the overall experience is better to the end user.



go to your Nvida Panel and see the option on bottom, when this option enabled, and also vsync enabled, thtat improve performance, and i'm speaking for Sli configuration


Actually, ksham knows exactly what vsync does and what screen tearing is.
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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 9:38:14 AM

Yes; I know what it is. Improve performance is a misnomer. vsync negates screen tearing so it feels smoother in gameplay. But that does not translate directly to increased FPS or improved performance. In fact, it's the opposite. Most people will compensate for a slightly reduced FPS for a smoother graphical transition in-game, because it is a lot less noticeable and a lot less distracting and annoying.
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July 16, 2014 10:57:43 AM

DSzymborski said:
MelodSpark said:
ksham said:
Wrong. Enabling vsync would normally reduce FPS and performance. All vsync does is prevent screen tearing, so with that extra processing, there is performance penalty even though the overall experience is better to the end user.



go to your Nvida Panel and see the option on bottom, when this option enabled, and also vsync enabled, thtat improve performance, and i'm speaking for Sli configuration


Actually, ksham knows exactly what vsync does and what screen tearing is.




So ?
i know exactly what i'm saying !! if your not convinced .then try it your self ;) 
i speak things i have experienced, in most of the games disabling Vsync the fps drops to 57fps, and enebale it, going to the same damn place, and the fps still 60 ;) 

so Enabling TripleBuffering and Vsync ..w'll or not improve performance!! that the question ;) 
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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 11:22:00 AM

You obviously don't because if you did, then you know that vsync synchronizes FPS in respect to your monitor's refresh rate. Hence why you see that. With vsync on, you cannot gauge performance levels accurately based directly on FPS because of that.
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July 16, 2014 11:27:50 AM

ksham said:
You obviously don't because if you did, then you know that vsync synchronizes FPS in respect to your monitor's refresh rate. Hence why you see that. With vsync on, you cannot gauge performance levels accurately based directly on FPS because of that.


I think fps is a reference point for performance globaly, now maybe i'm wrong , but try it Guys
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a c 133 ) Power supply
a b Î Nvidia
a c 169 U Graphics card
July 16, 2014 11:43:45 AM

Yes; but it's only a performance measurement with vsync OFF. If it is on, you will never get the right result because vsync synchronizes it to your monitor's refresh rate. That's why good tests and benchmarks do perform them with vsync off.

But if you don't want to believe me, I won't spend more time explaining this point.
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