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D2ultima

The SLI information guide

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Posted · Original PosterOP
5 hours ago, szym3k said:

So I used the Cooler Master calculator, to see what the power consumption was with my system and 1070ti SLI and it came to around 580 watts, would you say that it's still safe?

It's enough, it's a 650W PSU is it not?


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THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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12 hours ago, D2ultima said:

It's enough, it's a 650W PSU is it not?

Yeah, its a gold rated 650W from Corsair.


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Posted · Original PosterOP
7 hours ago, szym3k said:

Yeah, its a gold rated 650W from Corsair.

Right. The TX. It should be fine.


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THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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Interesting read on possible SLi + Gsync hits in some games, doesn't affect DX12 games though, I wonder what nVidia's spin gonna be on this:

https://www.extremetech.com/extreme/279259-nvidia-gpu-performance-craters-when-g-sync-sli-are-used-together


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Posted · Original PosterOP
17 hours ago, GamerDude said:

Interesting read on possible SLi + Gsync hits in some games, doesn't affect DX12 games though, I wonder what nVidia's spin gonna be on this:

https://www.extremetech.com/extreme/279259-nvidia-gpu-performance-craters-when-g-sync-sli-are-used-together

Gsync requires more bandwidth from SLI, so it would negatively affect scaling, and on x8/x8 systems it would knock some games into more unfavourable or even negative scaling if they were otherwise borderline or already low scaling situations.

 

DirectX 12 doesn't use SLI for any games yet (though bits DO exist, just unused) and thus are using just the PCI/e bus for multi-GPU, and handles things in a different manner. I don't know the specifics because it's a per-game situation, though, but it's possible the render type or how it's using the second card is not as affected by bandwidth.

 

*clicks link*

 

lmao lovely detection skills. The SLI/Gsync perf drop is indeed present but Octiceps was talking about 411.xx drivers being completely broken for gsync... it's a single GPU test. I talk to the dude all the time.

Screenshot_8869.png

Screenshot_8870.png

 

 

That said, the rest of the article rings true... it's using x8/x8 lanes because mainstream CPU, so little bandwidth.


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THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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I'll need to do some further testing but I'm sitting on 411.70 and I did not notice any significant problems so far. Maybe because I'm sitting at x16/x16?


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So I tested Witcher 3 really quickly (4213x1764, all maxed out, hairworks on, AA-off) and got about 5-6 fps difference with G-Sync on vs. G-Sync off.

 

Do I need to go back to 398.13 like Octiceps or is the 399.24 fine? 


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Sorry for triple post spam but this is the last one - I swear. 

 

So I went back to 399.24 and got back about 10 FPS. It's funny since I got now more FPS with G-Sync than I had before without it. 

 

EDIT: nevermind, false alarm. Didn't notice that reinstalling older drivers disabled my DSR factors and the game loaded in 3440x1440 instead of 4213x1764. Still similar performance, ie. with G-Sync there seem to be about 5fps hit.


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Posted · Original PosterOP
On 10/25/2018 at 4:10 AM, Lathlaer said:

Sorry for triple post spam but this is the last one - I swear. 

 

So I went back to 399.24 and got back about 10 FPS. It's funny since I got now more FPS with G-Sync than I had before without it. 

 

EDIT: nevermind, false alarm. Didn't notice that reinstalling older drivers disabled my DSR factors and the game loaded in 3440x1440 instead of 4213x1764. Still similar performance, ie. with G-Sync there seem to be about 5fps hit.

Yeah the only real fix for that is NVLink SLI not the bridge-based. But x16/x16 with a HB bridge is as fast as you can get without Turing


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THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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59 minutes ago, D2ultima said:

But x16/x16 with a HB bridge is as fast as you can get without Turing

Oh well, 5 fps when I'm hitting about 100-110 in Witcher 3 is something I can swallow xD I will stay with 399.24 just in case since I can't be bothered to be checking G-Sync on/off with every new game I try but I won't get lower since I want the game ready drivers for Shadow of the Tombr Raider :D


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Posted · Original PosterOP
On 10/27/2018 at 3:12 AM, Lathlaer said:

Oh well, 5 fps when I'm hitting about 100-110 in Witcher 3 is something I can swallow xD I will stay with 399.24 just in case since I can't be bothered to be checking G-Sync on/off with every new game I try but I won't get lower since I want the game ready drivers for Shadow of the Tombr Raider :D

The drivers don't really help. I've not seen Nvidia drivers help a game since Doom 2016 because of a new vulkan support going from 378.92 to 397.96 but that wasn't even a game ready driver.

 

That said, if NVLink worked properly you probably should be able to get a straight 95% or so scaling in Witcher 3 on matter Gsync, HDR, etc. But NVLink doesn't really work right now.


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THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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Just wanted to chime in and say how impressed i am with SLI recently. It seemed a couple years ago it was dying... honestly i think its making a comeback now. I've only had to go inspector on a couple games, and i've seen great scaling on so many!

 

Here's to the future of sli! And hopefully more well made titles like Shadow of the tomb raider, battlefield V, and Strange brigade.


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How can SLI help into my system?

 

I currently have an RTX 2070 ASUS ROG

 

Can someone help me how to perfectly SLI my card and to also overclock it?


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Posted · Original PosterOP
On 1/4/2019 at 8:46 AM, Stephanie Nakagawa said:

How can SLI help into my system?

 

I currently have an RTX 2070 ASUS ROG

 

Can someone help me how to perfectly SLI my card and to also overclock it?

Seeing as how it doesn't support SLI... no.


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THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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Would like your opinion. I am building a system for my son who is a gamer. Which would be better. all things considered. I have 2 GTX 1080's I can use for it.  Would it be better to put those in and run it in SLI or put in a single RTX 2080 or 2080Ti. I would really appreciate  any help?  Thank you.


I am a disabled Vet who had his hands crushed. Typing is not the easiest thing. So if I misspelled something please understand. Thank you.

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Posted · Original PosterOP
On 1/28/2019 at 2:18 AM, Ravenbear said:

Would like your opinion. I am building a system for my son who is a gamer. Which would be better. all things considered. I have 2 GTX 1080's I can use for it.  Would it be better to put those in and run it in SLI or put in a single RTX 2080 or 2080Ti. I would really appreciate  any help?  Thank you.

Single 2080Ti over two of any Pascal card, without a shadow of a doubt.

 

2080 if you can't afford that. 1080 and 1080Ti SLI require PCI/e 3.0 x16/x16 + high bandwidth bridge to work optimally, and the 2080Ti will do better in most situations. I would suggest getting a watercooled 2080 or 2080Ti though, since Turing is quite temperature sensitive.


Clevo P870DM3 (Eurocom) | i7-7700K | 32GB DDR4 2400MHz | GTX 1080N SLI | 850 Pro 256GB | 850 EVO 500GB M.2 | Samsung PM961 256GB NVMe | Crucial M4 512GB | Intel 8265ac | 120Hz Matte screen | 780W PSU

 

THE INFORMATION GUIDES: SLI INFORMATION || vRAM INFORMATION || MOBILE i7 CPU INFORMATION || Maybe more someday

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On 1/29/2019 at 2:41 PM, D2ultima said:

Single 2080Ti over two of any Pascal card, without a shadow of a doubt.

 

2080 if you can't afford that. 1080 and 1080Ti SLI require PCI/e 3.0 x16/x16 + high bandwidth bridge to work optimally, and the 2080Ti will do better in most situations. I would suggest getting a watercooled 2080 or 2080Ti though, since Turing is quite temperature sensitive.

Thank you very much for the info..  You helped me a lot..


I am a disabled Vet who had his hands crushed. Typing is not the easiest thing. So if I misspelled something please understand. Thank you.

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