Does DCS World support SLI

[BIGNEWY]

I gave up in the end with crossfire, I was on to the ATI forums daily for assistance, but it was futile :)

I am more than happy with one card now.

 

how many monitors do you have??

 

I was running 3 screens with my crossfire setup,

 

I am running 3 screens now on a Sapphire HD 7850 OC and its sweet :)

Edited December 8, 2012 by BIGNEWY

[Fish]

Thanks for all the replies, and discussion. After new drivers, and some testing, i have updated the initial post.

[Guy Smiley]

Hi guys, I'm still new to DCS and am a bit overwhelmed with all the info on this forum. I'm finding it hard to distill all the information that may be contained in bits and pieces throughout hundreds of posts!

 

I'm running surround screen with two gtx 480s (4320x900)and I'm getting the cloud flickering. I'm running the 1024 every frame. So is the advice to enable SFR instead of AFR2 in Nvidia Inspector? Do I just keep the same bits provided with the default Black Shark Nvidia profile?

[EtherealN]

A note: "1024 every frame" controls the multi-function-displays, Shkval (in Ka-50 etcetera), not overall graphics. The "1024" means that the viewport will be rendered in 1024x1024 pixels, and the "every frame" means that this viewport will be updated at the same rate as the general game. (So if your game is running at 60fps, each MFD/Skhval etc will also run at 60fps.) This also governs rear-view-mirrors.

[Guy Smiley]

A note: "1024 every frame" controls the multi-function-displays, Shkval (in Ka-50 etcetera), not overall graphics. The "1024" means that the viewport will be rendered in 1024x1024 pixels, and the "every frame" means that this viewport will be updated at the same rate as the general game. (So if your game is running at 60fps, each MFD/Skhval etc will also run at 60fps.) This also governs rear-view-mirrors.

 

 

Oh, I see! Thank you for clarifying that. I haven't as yet seen any flickering on any of the MFDs in the A-10 or KA-50, only clouds that flicker at the start of the mission and then go away pretty much as soon as I'm airborne, never to return. I gather this setting therefore doesn't apply to the P-51.

 

I tried the SFR suggestion that somebody had made earlier and it didn't appear to have any effect on the annoying cloud flickering, so I just put it back to the Nvidia Recommended AFR2.

[Fish]

cheers Quirk,

 

You will not get 100% addition performance,.....

yes understand that allright. But if it drives me from 40fps, to way over 60 (which is the refresh rate limit of my monitors, then im happy.

 

 

If you plan to use multiple monitors for gauges, mfds, etc,....

 

No. Never did it for me, and good zoom/TIR/Pause setup works fine for me. Sacrificing FPS for duplicated information does not make much sense for me.

 

However if you plan to triple screen, full screen with SLI, then it'll work.

 

I only tried this briefly, but its hard to drop frames to 1/3, after getting a taste for that 'smooth as butter' experience with the single monitor. Also not happy yet with how surround is implemented with DCS, side angles seem 'awkward' and unnatural, i know they are trying to bend a 3d image into flat surfaces, but they don't seem do do it as good as for example BMS has done. Maybe its a configuration issue. i think this discussion should be in a separate post.

[Quirkitized]

While using triple screens, still use the "1 Screen" option and not the "3 Screen" option. Using the 3 screen option will destroy your frame rate and imo, look like crap. 1 screen will give you the best performance still even for triple screen layout.

 

However, surround gaming with three screens in DCS has it's flaws like nearly every game with three screens, the side screens feeling a bit stretched and what not. But I haven't found a single game where that didn't happen to some extent.

 

If you were already using the 1 screen option, then nevermind all this :D

[wolle]

"Multicore development" is already "transparent".

 

Issue is that it is not exactly easy - and transforming an existing, singlethread codebase is even less so. It is, as they say, about as far as it is possible to get from the proverbial flipping of a compiler flag; it's something you want to do at the design stage not after implementation is already complete.

 

I apologize in advance for my probably ignorant opinion (I am not a software engineer or anything like that), but I have never understood why DCS is not multithreaded. There are so many tasks that could easily be run in parallel, because they are completely independent of each other and require no or very little exchange of data. Take as an example the calculation of aerodynamic forces for independent units, such as player and AI aircraft, the forces on one unit does not depend on that on another. Or moving ground force AI units around, and so on. As I said, just a layman's opinion...

[sobek]

Take as an example the calculation of aerodynamic forces for independent units, such as player and AI aircraft, the forces on one unit does not depend on that on another. Or moving ground force AI units around, and so on. As I said, just a layman's opinion...

 

Well, in a more sophisticated turbulence model, this would not exactly be true. That aside, the problem is not per se the flight models themselves, but that there is a gigantic interface with the rest of the simulation. Adapting interfaces in hindsight is a pain in the ass even in very simple software, and the pain in the assery grows exponentially with the size and complexity of a software project. It also depends on how the original code was written, whether it is object or process oriented. There are other complexities involved as well, such as scheduling, etc.

[Kuky]

While using triple screens, still use the "1 Screen" option and not the "3 Screen" option. Using the 3 screen option will destroy your frame rate and imo, look like crap. 1 screen will give you the best performance still even for triple screen layout.

 

While true that 3 Screen option will give worse frame rate, it's not true that it will look like crap because 1 Screen over 3 monitors will look like crap due to stretching of the image towards edges of the side screens. In this respect 3 Screen option is better choice as stretching is minimal.

[atomdude]

so does the current version of 1.5 support SLI? and how can you tell if it is using SLI?

[rrohde]

@atomdude

 

Not sure if it does work correctly without any NVIDIA profile, but I use NVIDIA Inspector with an DX11 profile; see screenshot here: http://screencloud.net/v/n3w2

(my settings might not be the best, so if someone thinks I could tweak some more - feel free to share)

 

I then use MSI Gaming App to enable GPU Usage overlays, and it does indeed loadshare my two GPUs between each other in DCS 1.5.

 

PS: This screenshot below shows the GPU Usage overlays in action in the top-left corner... (never mind the crash message) :)

 

Edited October 26, 2015 by rrohde
Added screenshot