Poor SLI performance compared to Project Cars 2

[Bishop Knight]

I see that Automobilista 2 uses the same engine as Project Cars 2. So, why the poor SLI performance? I used nvidia inspector to assign Automobilista 2 to the PC2 profile but still get Card 1 65% and Card 2 55%. And my CPU is only around 85%. With everything just about maxed out I get 65-70 fps. In PC2 I get Card 1 95% and Card 2 85% and around 70 fps. Seems like a lot of power left untapped by Automobilista 2.

[Zevras]

SLI is basically dead tech. It doesn't interact well with modern rendering algorithmns.

[4speed318]

Originally posted by Zevras:

SLI is basically dead tech. It doesn't interact well with modern rendering algorithmns.

SLI works best with older titles
still you are getting around the same FPS
and you never mentioned what cards you have in SLI

[Bishop Knight]

Originally posted by Zevras:

SLI is basically dead tech. It doesn't interact well with modern rendering algorithms.

You're missing the point. Automobilista 2 uses the PC2 engine which has SLI support built in.

Also, SLI is not needed for multi-video card use. Vulcan and Direct X12 have the support built in. So, why is AMS2 not making a feature, from the very engine they are using, available?

Triple screen 4K is going to require multiple cards to have decent frame rates. Getting away from multi-gpu support is the exact opposite that sims of any kind should be getting away from. Before the console gamers started migrating to PC, PC exclusives pushed the boundaries of PC hardware. They supported setups not possible on consoles. It's sad when a platformer, like Tomb Raider, supports muti-gpu beautifully, but a racing or flight sim doesn't. Now, because they want to migrate their games to console with more ease, they drop pushing PC tech. Adding support isn't going to take away from single-gpu users from being able to play.

Nvidia is dropping SLI in the gaming market to force programmers to take the heat for not supporting Multi-GPU instead of them. SLI on the professional market is still staying around because it's not little boys using that hardware. I do CGI work so multi-gpu will be something I always buy regardless of the pc gaming use. But, it would be nice to see PC games get back to being PC exclusives that push all available tech, like Multi-gpu, Multi-cpu, Multi-thread.

[BeGee]

Have you tried launch option -dx11mt ? As I understand it AMS2 uses -dx11st as default while PC2 uses the multithreaded option by default.

[Bishop Knight]

Originally posted by BeGee:

Have you tried launch option -dx11mt ? As I understand it AMS2 uses -dx11st as default while PC2 uses the multithreaded option by default.

I'll give it a try.

[LibranRabbit...the 1%]

Make a new seperate profile for AMS2. Copy all the settings from PC2 (don’t forget hidden ones) add AMS.exe to it. Then you can tweak to suit using FRPS monitor.