URGENT Lower Performance with SLI

[A Silver]

UPDATE: I ran time spy and got a way better result than with a single GPU but it says my graphics driver is not approved. Why is that? Is it because i just upgraded to the newest nvidia driver?

 

 

I just got a second GTX 1080 and when i open forza horizon 3 i was shocked to see i was at 50fps where i  use to get 75 (I capped it to 75 as the fps was very unstable). How can i fix this as it is a lot of money to spend just to get lower performance. I have a 1080p monitor but i am running the game at 4k using dynamic super resolution. One card is Gigabyte and one is zotac.

[NinJake]

Have you done any benchmarks with just 1 1080, and then benchmark again with SLI?

 

Also... I'm not sure if it's a good idea to run 2 different cards even though their both 1080s...

[Mira Yurizaki]

SLI isn't guaranteed to boost performance and can degrade it, depending on the game or if there's a profile for the game in the drivers. So run other benchmarks and games and compare the results to make sure it's actually your setup rather and not just a fluke that Forza doesn't like SLI.

[stealth80]

Some games do have negative SLI scaling, have tried any other games?

[stealth80]

Forza 3 doesn't support SLI I just checked, try a different game - infact, aint it a windows store game? if so I didn't come across any windows store game that did, something to do with Fullscreen access

[AntonChigurh]

Buying a second 1080 is not gonna necessarily get you better performance. I think Forza has negative scaling with SLI, so just turn off SLI before you play. Also, why are you running two different 1080 models in SLI? That's really not the best choice

[A Silver]

21 minutes ago, N1ghtshade said:

Buying a second 1080 is not gonna necessarily get you better performance. I think Forza has negative scaling with SLI, so just turn off SLI before you play. Also, why are you running two different 1080 models in SLI? That's really not the best choice

I only got a different brand as the zotac mini one is the only one which fits in my case as the HDD cage is in the way

[AntonChigurh]

Just now, A Silver said:

I only got a different brand as the zotac mini one is the only one which fits in my case as the HDD cage is in the way

Well why didn't you get two zotac minis? Or just not get a second card?...

[A Silver]

31 minutes ago, stealth80 said:

Forza 3 doesn't support SLI I just checked, try a different game - infact, aint it a windows store game? if so I didn't come across any windows store game that did, something to do with Fullscreen access

I played GTA 5 and i got the same FPS as before

[AntonChigurh]

1 minute ago, A Silver said:

I played GTA 5 and i got the same FPS as before

How? GTA V is not kind towards SLI, and everyone I know that's used SLI on GTA V has gotten tons of microstutter and lower fps

[App4that]

Just now, N1ghtshade said:

How? GTA V is not kind towards SLI, and everyone I know that's used SLI on GTA V has gotten tons of microstutter and lower fps

100% BS and I've disproved this too many times to have to do it again.

 

OP, it's just Forza. Forza doesn't have a profile for Microsoft reasons. 

[AntonChigurh]

Just now, App4that said:

100% BS and I've disproved this too many times to have to do it again.

Oh dear lord, not this again. GTA V has problems on this with newer cards (Pascal). It's not as bad on Maxwell, and SLI with older cards will do just fine with GTA V, but newer cards have trouble with it. OP has a 10 series, so I found it odd that he didn't have any problems with microstutter.

 

 

[App4that]

Just now, N1ghtshade said:

Oh dear lord, not this again. GTA V has problems on this with newer cards (Pascal). It's not as bad on Maxwell, and SLI with older cards will do just fine with GTA V, but newer cards have trouble with it. OP has a 10 series, so I found it odd that he didn't have any problems with microstutter

 

 

It's not a matter of older verses newer... It's that the 2 1080ti cause the 7700k to be a bottleneck. You see the same thing with 2 1070 verses 2 1080 where the 2 1070 can actually perform better. 

 

Up the resolution until the load is on the cards, that's the fix. 

[stealth80]

19 minutes ago, N1ghtshade said:

How? GTA V is not kind towards SLI, and everyone I know that's used SLI on GTA V has gotten tons of microstutter and lower fps

Nope wrong, I had great SLI results with 2x 970's, don't believe everything you read.

 

13 minutes ago, N1ghtshade said:

Oh dear lord, not this again. GTA V has problems on this with newer cards (Pascal). It's not as bad on Maxwell, and SLI with older cards will do just fine with GTA V, but newer cards have trouble with it. OP has a 10 series, so I found it odd that he didn't have any problems with microstutter.

 

 

Also lol, massive bottleneck for the 7700k unfortunately - They should run on some newer games like Watch Dogs 2 etc at 4k

[AntonChigurh]

edit: Bad wifi made this post twice, mods delete this post pls

[AntonChigurh]

1 hour ago, App4that said:

It's not a matter of older verses newer... It's that the 2 1080ti cause the 7700k to be a bottleneck. You see the same thing with 2 1070 verses 2 1080 where the 2 1070 can actually perform better. 

 

Up the resolution until the load is on the cards, that's the fix. 

The 7700k is not a bottleneck. 2 x 1080ti's won't get bottlenecked even with a 3770k.

 

And even at 4k, you still get bad results.

[App4that]

3 minutes ago, N1ghtshade said:

The 7700k is not a bottleneck. 2 x 1080ti's won't get bottlenecked even with a 3770k.

 

And even at 4k, you still get bad results.

No, please know the topic before posting. 

 

 

[AntonChigurh]

13 minutes ago, App4that said:

No, please know the topic before posting. 

 

 

 

 

 

 

  

[pas008]

3 minutes ago, N1ghtshade said:

 

 

 

 

  

lol if there is video of both it working and non working have you came to the conclusion of user error?

 

been running sli since 8500gt's ran many different cards

never had these issues

[App4that]

4 minutes ago, N1ghtshade said:

snip

Because you found someone who knows less than you, you think that's evidence?

 

Good luck. 

[AntonChigurh]

Just now, pas008 said:

lol if there is video of both it working and non working have you came to the conclusion of user error?

No. I have come to the conclusion that SLI is a mess. Don't get me wrong, I love SLI, but in an odd sense. I love it because it's an innovative concept, and with some tuning, Nvidia could make it great, and it would be worth the money. I hope we'll see everyone in the future with dual GPU systems that could handle anything. Unfortunately, Nvidia released an unfinished mess of a product, and along with the fact that devs for some reason don't want to support it, it sees barely any benefit in games that can benefit from it, and worse performance in games that can.

[AntonChigurh]

Just now, App4that said:

Because you found someone who knows less than you, you think that's evidence?

 

Good luck. 

???

[App4that]

1 minute ago, N1ghtshade said:

???

I play GTA V in SLI, I've posted screenshots showing the difference between using one card and 2. I've shown how you can cherry pick and make it look like the scaling isn;t that good because of how CPU demanding some areas are. 

 

This dead fucking horse has been beaten into glue.

[AntonChigurh]

1 minute ago, App4that said:

I play GTA V in SLI, I've posted screenshots showing the difference between using one card and 2. I've shown how you can cherry pick and make it look like the scaling isn;t that good because of how CPU demanding some areas are. 

 

This dead fucking horse has been beaten into glue.

Yes I'm aware. I said before, SLI helps keep older cards relevant. And atm that's the only thing it's good for.

 

Why did you bring it up then?

[pas008]

3 minutes ago, N1ghtshade said:

Yes I'm aware. I said before, SLI helps keep older cards relevant. And atm that's the only thing it's good for.

 

Why did you bring it up then?

how many sli systems have you owned

8500gts

8800

250

260

460

560ti

670 actually tried 3way

970

soon 1080ti

 

please advise me how horrible it is that I keep going to sli?