NVIDIA GeForce GTX 1080 SLI

[W1zzard]

Crysis 4K at more than 60 FPS! We take a close look at multi-GPU SLI with two GeForce GTX 1080 cards in 16 games and at 4 resolutions. We used an SLI HB bridge for all testing, but also have numbers with the old bridge to find out whether a high-bandwidth bridge is absolutely necessary for SLI on Pascal.

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[Ferrum Master]

Ughr... The scaling isn't really good.

 

[Aquinus]

In other words, SLI'ing the 1080 only makes sense if you're running 4k, otherwise the improvement is pretty minor, probably due to a CPU bottleneck.

 

[Eroticus]

In other words, SLI'ing the 1080 only makes sense if you're running 4k, otherwise the improvement is pretty minor, probably due to a CPU bottleneck.

CPU bottleneck in 900p/1080p, but everything fine in 4K ?

Sorry but what ? did i missed something ?

 

[TheLostSwede]

Looks like Nvidia has a lot more work to do on their drivers...

 

[Aquinus]

CPU bottleneck in 900p/1080p, but everything fine in 4K ?

Sorry but what ? did i missed something ?

Yeah, CPU load tends to scale to frame rate not resolution. It's easy for the GPU to churn out frames at lower resolution which puts more burden on the CPU. Higher resolutions have the GPU spending more time doing work which reduces frame rate and in turn, less needed CPU power for rendering over time.

 

[ZoneDymo]

Well guess we can now estimate it will be about a gen or 2 past this one before we can all do 4k for a reasonable price.

 

[Jack1n]

Well, what a surprise, Nvidia lied about the necessity of the their new SLI bridge.

 

[Chaitanya]

Well, what a surprise, Nvidia lied about the necessity of the their new SLI bridge.

Plus you can always use two "classic" bridges in case extra "bandwidth" is needed.

 

[Frick]

When it works it works seemingly fine. Look at BF4 and GTA V.

 

[AHMAD_ESLIM]

why the hell rise of tomb raider is not good scaling on DirectX 12 ??
I guess Nvidia is ruining the performance again in DirectX 12 To make AMD asynchronous compute not useful for DirectX 12
like what they did by put heavy tessellation on crysis 2
See This "

"

 

[techy1]

a clear step back in sli scaling... yea I know it is always "the drivers not out there yet", but it was factor also before and previous gen cards in sls offered more improvements.

 

[TheLostSwede]

Plus you can always use two "classic" bridges in case extra "bandwidth" is needed.

Have you tested that? I'm pretty sure I read somewhere that it doesn't work properly.

 

[W1zzard]

Have you tested that? I'm pretty sure I read somewhere that it doesn't work properly.

I did some very quick testing and it looks like only one bridge is active when two are connected (checked with a scope), but the scope is kinda slow with 100 MHz bandwidth, so no conclusive evidence.

 

[Ferrum Master]

GTA V.

You sure. Look at Strix and Strix SLI not the plain 1080FE.

 

[Enterprise24]

HB bridge scale well in firestrike benchmark.

http://www.vmodtech.com/th/article/nvidia-hb-bridge-for-pascal-gpus-review/page/2

 

[bug]

Well guess we can now estimate it will be about a gen or 2 past this one before we can all do 4k for a reasonable price.

I think you're optimistic, next gen won't offer playable 4k@reasonable price. In my case, reasonable price is ~$200. I'm betting on 2-3 more generations, but that depends on how 10bit and HDR catch on, because those would incur further performance penalties.
I would love to play games and edit my photos @4k, but I'm not spending $599 on a video card. Hell, I'm not spending $400.

 

[enya64]

It makes you wonder how the Xbox Scorpio and Playstation Neo are going to tout full 4k gaming when even 2 of the fastest current pc cards on planet can barely do it. I just 4K at 20-30 fps will be the norm in a year for console gaming. Let's bring on the dual 1070 sli review and see how close the performance is!!!

 

[Frick]

You sure. Look at Strix and Strix SLI not the plain 1080FE.

? Maybe should have added "at 4K".

 

[TheLostSwede]

I think you're optimistic, next gen won't offer playable 4k@reasonable price. In my case, reasonable price is ~$200. I'm betting on 2-3 more generations, but that depends on how 10bit and HDR catch on, because those would incur further performance penalties.
I would love to play games and edit my photos @4k, but I'm not spending $599 on a video card. Hell, I'm not spending $400.

In 2-3 generations we'll have 8k screens...
"A new 31.5" IPS panel (part number tbc) with "8K4K" resolution of 7680 x 4320."
http://www.tftcentral.co.uk/news_archive/35.htm#panels_update

 

[Nihilus]

Rather crummy results. I would like to see 6 core CPU results and up, but we shouldn't need a $1000 platform to run SLI BEFORE we even buy the cards.

It seems the 980ti/fury did much better with less CPU, even when going to trifire/quadfire.

 

[okidna]

why the hell rise of tomb raider is not good scaling on DirectX 12 ??
I guess Nvidia is ruining the performance again in DirectX 12 To make AMD asynchronous compute not useful for DirectX 12

There's no official SLI and CrossFire support for DirectX 12 version of Rise of the Tomb Raider.

 

[azngreentea01]

Would techpowerup able to do 1070 sli review?

Also, it would seem it a waste of money to buy the new HBbridge, i dont see any different.

 

[mroofie]

In other words, SLI'ing the 1080 only makes sense if you're running 4k, otherwise the improvement is pretty minor, probably due to a CPU bottleneck.

Another reason why we need dx12

 

[SpAwNtoHell]

Ok, as w1zzard stated, but also concluded looking at graphs... SLI is worth only for 4k, as long as games are made to scale in SLI and the gain when they do can be up to 90% roughly... And i have a feeling hbm is usefull only above 4k.

Not a fan of sli and as many i prefer single gpu solution but i have to ask, w1zzard how minimum framerate scales in sli as i had a look at some other sli benchmark with 1080 and frankly i was dissapointed as minimum was few fps above a single card?!?! Tho average reflected pretty much what you posted obviously in the titles that match. I know some will argue that is not the same test system but still was pretty similar and should of not affect that much.

Another question: was the tipic SLI micro stutering fixed improved somehow or the same with 1080?

Ps: 1080 is not overkill for FHD if above 100fps is necessary as a minimum on a 144hz monitor but yes will be for any lower res and refresh.