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GTX 780 3-Way SLI

post #1 of 22
Thread Starter 
I currently have 2 EVGA GTX 780s SC (non ACX) for triple monitor gaming 5760x1080

I was thinking about getting a 3rd.


My questions are:


1) Is the performance between two 780's to three 780's worth the additional price? Or does it not scale well with 3. (price / performance)

2) I read that nvidia really improved the SLI micro stuttering for 2 cards. How about 3? Is it going to hurt me getting a 3rd?

3) Is a 1250watt gold power supply enough for 3 GTX 780's (Will overclock)?



Thanks smile.gif
post #2 of 22
it looks like triple scaling is just as inefficient as with the Titans......but keep in mind that by adding a 3rd, overall gpu usage will drop, lowering noise.......your psu is MORE than enough
    
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post #3 of 22
yes, scaling is terrible and realy not worth the price. You only gain a few fps on specific games, you might as well loose fps on some other.
keep in mind that 2 gpu is the sweetspot and that more trouble start at 3.
as for question 3, 1200W is enough. But i'm not sure it matters anymore ...
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post #4 of 22
Thread Starter 
Quote:
Originally Posted by kamimaru View Post

yes, scaling is terrible and realy not worth the price. You only gain a few fps on specific games, you might as well loose fps on some other.
keep in mind that 2 gpu is the sweetspot and that more trouble start at 3.
as for question 3, 1200W is enough. But i'm not sure it matters anymore ...

This is exactly what I have been seeing / was thinking so thanks for the info. Looks like I will keep my 2 x GTX 780's and OC as much as possible.

Thanks!
post #5 of 22
3 way SLI scaling is terrible, even with 5760x1080 - it really is not worth the money. In some games you will get worse performance with 3 way SLi than with 2 way SLi.
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post #6 of 22
Thread Starter 
According to some reviews of 3-way TITANs, there seems to be a decent FPS jump.

http://www.guru3d.com/articles_pages/geforce_gtx_titan_3_way_sli_review,18.html

http://www.guru3d.com/articles_pages/geforce_gtx_titan_3_way_sli_review,19.html

( ~about 20+ fps with a 3rd card)
Edited by 209ham - 6/10/13 at 3:34am
post #7 of 22
Yes I went from 2 to 3 GTX 480s and the glorious heaven of bull **** started to rain.

I was hoping they would have sorted that by now but hey.

Really is a shame that the scaling hasn't improved mad.gif
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post #8 of 22
Quote:
Originally Posted by 209ham View Post

According to some reviews of 3-way TITANs, there seems to be a decent FPS jump.

http://www.guru3d.com/articles_pages/geforce_gtx_titan_3_way_sli_review,18.html

http://www.guru3d.com/articles_pages/geforce_gtx_titan_3_way_sli_review,19.html

( ~about 20+ fps with a 3rd card)

23fps gain in Metro 2033
20fps gain in Medal of Honor
12fps gain in Far Cry 3
16fps gain in Battlefield 3
Zero gain in Hitman
Zero gain in Anno 2070

If you consider those gains to be worth £550 then buy a third 780.

Also, these benchmarks were done with a 3960X, you want to make sure you have a CPU that won't bottleneck 3 780s.
Edited by VindalooJim - 6/10/13 at 3:49am
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post #9 of 22
it would be more wise to buy 2 titans over 3 780s, but anyway, 2 780s may hold that resolution for a while at decents fps.. good luck

Quote:
Originally Posted by Vlasov_581 View Post

it looks like triple scaling is just as inefficient as with the Titans......but keep in mind that by adding a 3rd, overall gpu usage will drop, lowering noise.......your psu is MORE than enough

dude, do you still have/use the rig on your signature ? cool, post some pics of your ultras.. thumb.gif
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post #10 of 22
Quote:
Originally Posted by Yukss View Post

it would be more wise to buy 2 titans over 3 780s, but anyway
I wanted to say that as well but concidering the investment on the 2 GTX 780 has already been made ... well I know I would hate myself in that position (just like I did when I bought a 680 the day before the 670 was released).
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