SLI Performance Scaling - Gaming at 4K Resolution

[jh30uk]

Related to other video I added:

http://forums.overclockers.co.uk/showthread.php?t=18628577

 

[Gregster]

Nice one and Linus honest as always

 

[Silent_Scone]

Pick a caption

 

[Woodsta888]

Shame - Though who's problem is it - Nvidia's or the game developers?

The power draw is VERY impressive though I dunno how intensive is the 'stare at the fire test' in FC3?

 

[Woodsta888]

Pick a caption

I have 2 very tight nuts to make my squeaky voice

 

[GoogalyMoogaly]

I'm hoping this is because the 980 is new and has immature drivers and in time will improve so that at least 3-way is viable.

 

[Kaapstad]

I am at work at the moment, can someone say what the point he is making in the video is please

 

[almighty15]

I am at work at the moment, can someone say what the point he is making in the video is please

That after 2-way GPU's you can't just use average and minimum frame rates to judge a cards performance, you have to use FCAT.

He also said that FCAT was not needed to messure stuttering on 3 and 4-way GTX980's as it was visually obvious to the naked eye without having to use captuing tools.

He said that 2-way SLI was flawless though.

 

[Kaapstad]

That after 2-way GPU's you can't just use average and minimum frame rates to judge a cards performance, you have to use FCAT.

He also said that FCAT was not needed to messure stuttering on 3 and 4-way GTX980's as it was visually obvious to the naked eye without having to use captuing tools.

He said that 2-way SLI was flawless though.

Thanks

I think I will walk away now.

 

[jh30uk]

Other video I duped did not show up in SEARCH as Gregg changed the title.

 

[Yaayuh!]

*sigh*
Does Linus still exist?

 

[jh30uk]

Thanks for that input, and who are you exactly?

 

[Wilko_Dog]

Who's fault is it that 3 and 4 cards don't tend to work to well, looking at the tomb raider results it must be down to lazy developers surely ?

 

[jh30uk]

Sure does look like its down to the games coding, and that is a AMD game AFAIK.

 

[Deceptor]

Who's fault is it that 3 and 4 cards don't tend to work to well, looking at the tomb raider results it must be down to lazy developers surely ?

I wouldn't say lazy personally, the amount of effort needed for perfect/near-perfect scaling is honestly not worth it when you consider such a small fraction of players will be able to benefit from it for 3/4-way configurations.

That said I'm happy that 2-way SLI/CF is always pretty darn good

 

[Kaapstad]

Who's fault is it that 3 and 4 cards don't tend to work to well, looking at the tomb raider results it must be down to lazy developers surely ?

Tomb Raider has almost perfect scaling on 4 cards with both AMD and NVidia, there are a lot of other games that also have near perfect scaling on 4 cards.

Where it goes wrong is with lazy reviewers, you need to use a 4K monitor to test out 4 way scaling properly.

The other thing that will mess up 4 way scaling at high resolution is to use a 256bit bus, I think it is time to leave this thread quick.

 

[Shiari]

The other thing that will mess up 4 way scaling at high resolution is to use a 256bit bus, I think it is time to leave this thread quick.

 

[Kaapstad]

The problem with SLI is you are sending the combined output of all the cards through the bus on each card, if that is 4 cards with 256bit buses at 4K it can be very unfortunate.

My two GTX 690s are totally useless at anything higher than 1600p, I can use them to read emails and browse forums at 4K though.

 

[Woodsta888]

That after 2-way GPU's you can't just use average and minimum frame rates to judge a cards performance, you have to use FCAT.

He also said that FCAT was not needed to messure stuttering on 3 and 4-way GTX980's as it was visually obvious to the naked eye without having to use captuing tools.

He said that 2-way SLI was flawless though.

FCAT was also used to show when AMD cards dropped frames that were otherwise reported as FPS on screen. In the GURU3D review on Sli the 970's & 980's are currently dropping frames so those FPS you see quoted for these cards are currently suffering the same problem the FCAT software was designed to illustrate. Nothing some drivers wont sort out though.

 

[Uncle Petey]

Sure does look like its down to the games coding, and that is a AMD game AFAIK.

Yes it is and if you have a look at the bench thread here, you'll find that the last gen NV cards aren't doing too badly at all in terms of performance and scaling with multiple cards.

It's probably just an immature driver thing with new cards, unless Kaap is on the money with the bus thing.
Perhaps a bit of both maybe.