SLI Issues need Help

[MadyTehWolfie]

So I bought two 1080ti's and for some reason im having issues. I used the game the witcher 3 and im only getting single card performance yet the top card says 80% and the bottom sits at 60-70%. This has me so annoyed if I cant find a fix Im selling the secon card. I tried both cards without sli and they both work as intended so, an I tried swapping the top and bottom card so im at a 100% loss here.

[cesarbg]

41 minutes ago, MadyTehWolfie said:

So I bought two 1080ti's and for some reason im having issues. I used the game the witcher 3 and im only getting single card performance yet the top card says 80% and the bottom sits at 60-70%. This has me so annoyed if I cant find a fix Im selling the secon card. I tried both cards without sli and they both work as intended so, an I tried swapping the top and bottom card so im at a 100% loss here.

most games are not sli ready, some actually perform worse with sli, its better to stick with one

[MadyTehWolfie]

Just now, cesarbg said:

most games are not sli ready, some actually perform worse with sli, its better to stick with one

Witcher 3 is well known for having good sli support. 

[Mick Naughty]

If they are both working it’s supported. 

 

Sounds like an issue elsewhere. 

 

Need specs and stats of hardware while under load. 

[MadyTehWolfie]

On 2/18/2018 at 8:17 AM, Mick Naughty said:

If they are both working it’s supported. 

 

Sounds like an issue elsewhere. 

 

Need specs and stats of hardware while under load. 

U found out the issue. It doesn't like my ultrawide. Runs fine with both at 100% on the 16:9 monitor but for some reason I think it's seeing my ultrawide as multi monitor and not a single screen. 

[Mick Naughty]

2 minutes ago, MadyTehWolfie said:

U found out the issue. It doesn't like my ultrawide. Runs fine with both at 100% on the 16:9 monitor but for some reason I think it's seeing my ultrawide as multi monitor and not a single screen. 

Surprised that cpu is keeping up regardless. That's the only issue I had, sli with enough pixels was stressing the cpu too much and dropping performance for the cards.

[MadyTehWolfie]

I was getting over 200fps in 1080p when I tested my CPU. Only saw 50% CPU utilization when I did that in Witcher 3. When I put it in 4k it's not a issue at all as the fps doesn't get high enough to overload the CPU with frames to render.

 

Edit: i7 6700k is more then enough CPU power for what I'm using these cards for. Seems to just be a issue with the ultrawide and sli.

[Mick Naughty]

Shouldn't change anything unless the game has an issue at that res. I play at 3k for a lot of games and only had issues with cpu's for a few. I tend to play cpu intensive games though so it happens often. 

[Frankenburger]

Do you have AA enabled?

 

If so, disable it and use ReShade FXAA or Driver FXAA. Witcher 3 uses TAA, which kills SLI at higher resolutions.