SLI is working

[GrendelsDad]

I had to adjust settings in NVispector profiles...set everything to AFR...seems to be working according to performance and GPU-Z testing.

[konate]

What are "SLI" and "AFR"?

[GrendelsDad]

SLI is the dual card option for Nvidia users...and AFR is (alternate frame rendering...I think)

[konate]

Sorry to ask; but what are the advantages of a dual card?  I have just a singe Nvidia card.

[GrendelsDad]

Theoretically it should make games run faster...Higher Frame rates.  Until the DX11 patch it was a small difference in this game.  Not sure after patch...I will have to run some tests.(Seems to be holding above 60 fps)  Other games it has made a great difference.  Total War Warhammer comes too mind as a game that has a marked improvement in FPS. 

[gnomechompsky]

Didn't make any difference for me - GPU2 utilization was still 40%.  

 

SLI was definitely working before just not having much of an effect due to CPU bottlenecking.  Still it got me extra frames.

[GrendelsDad]

Yeah I read another thread where it wasn't working. I will have to investigate further. I am playing at 5820 x 1080 so always looking for that extra boost. I should mention that I did enable the S.T.A.L.K.E.R. profile under the DX 11 bits because that was the corresponding profile fir DX 9 that worked previously. Not really sure if that mattered?

Edited December 21, 2016 by II./ZG1_GrendelsDad

[GrendelsDad]

You might be able to help stutters by increasing smoothness in the track ir profile and/or in game camera settings. v-sync also?

[LLv24_Zami]

Not working for me. GPU2 usage is still 1-2% during game.

[Sketchy]

With default setup in Nvidia control panel, my GPU 1 usage is at 99%, while GPU 2 usage is at 2-3%. When i set forced alternate frame rendering, both GPUs run at 50-60%, but the FPS is actually reduced by ~10%. I also get some stutters.

 

Before the last update SLI increased my FPS by about 10-20 %. After the update, GPU 2 is in reality idle. I see Han replies to a SLI question today that SLI is working with DX11. With no performance increase, you can't really say SLI is working.

 

It might be that my CPUs bottlenecking, but is seems rather suspicious that one card is running at full while the other is idle.

[kileab]

There is no bit settings under SLI DX11 in the BOS profile so SLI is not enable.

 

I hope Han understand that and will work with Nvidia soon. If not we will wait a few more weeks to enjoy SLI again.

 

Can somebody make a bug report please ? I don't have access to my PC during holidays.

[gnomechompsky]

Nvidia didn't make a bits for dx9 why would they for dx11?

Also going slightly off topic but I am the only one that has to reenable the "multi GPU" setting every time I start the game?

[kileab]

No me too, from the beginning.

Actually there is a bit for DX9.

[gnomechompsky]

Ok I thought everyone was using the STALKER bit. In that case maybe nvidia will get round to making one for dx11 and the devs will fix the option of multi GPU deselecting itself every time the game restarts.

[kileab]

If you check, at the end of the Stalker bit there is the BoS label

[SCG_Tzigy]

for me SLI working, and stays selected in graphics options only, no effect either way when selected in the launch menu...

[Dakpilot]

Pretty sure the option in launch menu is now redundant and 'left over' from much earlier builds

 

SLi is auto recognized, from what I remember a Dev saying, but no idea from which thread I remember it from, so take with the usual pinch of salt

 

Cheers Dakpilot

[LLv24_Zami]

 

I see Han replies to a SLI question today that SLI is working with DX11. With no performance increase, you can't really say SLI is working.

 

Care to link Han`s answer? I didn`t find it.

 

It is clear that SLI is not working. GPU2 is always idle when playing BoS.

Edited December 27, 2016 by Zami

[kileab]

https://forum.il2sturmovik.com/topic/7-questions-developers/?p=424300

 

22nd answer I think

[ACG_pezman]

https://forum.il2sturmovik.com/topic/7-questions-developers/?p=424300

 

22nd answer I think

If Han is saying that DirectX11 and SLI work, then how do we get them to work?  Turning on SLI on my PC shows that the second GFX card isn't being utilized at all.  Yet if you force AFR on your cards, it's not SLI, but two cards doing the work of one card.  So I am confused.  How do we get it to work?

[Dakpilot]

Nvidia didn't make a bits for dx9 why would they for dx11?

Also going slightly off topic but I am the only one that has to reenable the "multi GPU" setting every time I start the game?

 

Nvidia added Il-2 BoS in 344.16 drivers, it was in the Nvidia release notes

 

am sure it will be added again for DX11 update

 

Cheers Dakpilot

[kileab]

I don't think Nvidia guys are saying "hey they change the graphic engine of our favorite sim, let's see if our SLI settings are still OK"

 

Han's answer worries me. Perhaps he doesn't know SLI is not working anymore.

[kileab]

Guys, I tried ALL the SLI compatibility bits available for DX10/11. Nothing works :/

However, some like 0x080240F5 (Squadron 42 - Star Citizen) almost double the FPS. unfortunately there are artifacts.

[gnomechompsky]

Wow good effort. I guess this shows what will be possible if nvidia can make a proper profile.

[SCG_Tzigy]

for me SLI working, and stays selected in graphics options only, no effect either way when selected in the launch menu...

 

i stand corrected. no longer works, tested again with MSI afterburner

 

initially i had it working, different set of drivers i think (was trying multiple, might have been the most recent official nvidia before hotfix applied?), now running 376.48 and no SLI

[LLv24_Zami]

Guys, I tried ALL the SLI compatibility bits available for DX10/11. Nothing works :/

However, some like 0x080240F5 (Squadron 42 - Star Citizen) almost double the FPS. unfortunately there are artifacts.

Just tried this for fun and OMG what a difference in fps! So smooth.

 

Now Nvidia, get to work and give us our SLI. Single 970 is really struggling with my resolution.

[Urra]

Guys, I tried ALL the SLI compatibility bits available for DX10/11. Nothing works :/

However, some like 0x080240F5 (Squadron 42 - Star Citizen) almost double the FPS. unfortunately there are artifacts.

Isn't it possible to enter numbers manually into this field? If I delete the existing dx9 profile info and If I set dx11 line to 0x0000005 (the next line down) it works perfectly for my 980 cards. gpu % is halved for each card for the same frame rate. In my case 60fps. No flicker, no problems.

 

Ok, where is my cookie?!

Edited January 13, 2017 by Smok

[LLv24_Zami]

Isn't it possible to enter numbers manually into this field? If I delete the existing dx9 profile info and If I set dx11 line to 0x0000005 (the next line down) it works perfectly for my 980 cards. gpu % is halved for each card for the same frame rate. In my case 60fps. No flicker, no problems.

 

Ok, where is my cookie?!

Nice find but not working perfectly for me. No artifacts but second GPU is not used very much and there`s a lot of stutters when moving my head. You just changed the two lines, right? And what driver version are you using?

[Urra]

376.48 hotfix windows10. I only changed the two lines correct. I also have max number of prerendered frames set to the absolute minimum, but this frame change through the regular Nvidia control panel.

Edited January 13, 2017 by Smok

[kileab]

to see if it's really working, disable your VSync and test the two parameters. If you have no gains in fps with 2 cards, the only thing you'll have is more watt consumption.

[Urra]

4k 60Hz Gsync monitor used. Using two cards keeps them cooler. 60f versus 80f, ( convert to celcius if needed) because the % of usage for each is halved. Using a single card previously I was warming up the entire room. Like sitting next to a small fireplace in winter time.

[SCG_Tzigy]

Isn't it possible to enter numbers manually into this field? If I delete the existing dx9 profile info and If I set dx11 line to 0x0000005 (the next line down) it works perfectly for my 980 cards. gpu % is halved for each card for the same frame rate. In my case 60fps. No flicker, no problems.

 

Ok, where is my cookie

 

 

 Where is that line to change the parameters? Nvidia Inspector or config.ini?

 

thx

[Urra]

Where is that line to change the parameters? Nvidia Inspector or config.ini?

 

thx

Nvidia Inspector. The Il2 Battle of Stalingrad profile.

[LLv24_Zami]

Now with further testing, MSI Afterburner shows both cards used equally. But still it`s not working for me, I get heavy stuttering when for example zooming in. Smok has Gsync monitor so that could be the reason why he don`t see any hiccups.

 

So, let`s pray Nvidia delivers a profile soon...

[Urra]

Now with further testing, MSI Afterburner shows both cards used equally. But still it`s not working for me, I get heavy stuttering when for example zooming in. Smok has Gsync monitor so that could be the reason why he don`t see any hiccups.

 

So, let`s pray Nvidia delivers a profile soon...

If this is true, which it probably is, than you could try turning on the newer "fast sync" option and see what you get, as a last effort. I completely forgot that I currently have AA off and FXAA on. Edited January 13, 2017 by Smok

[gnomechompsky]

I haven't had time to experiment but it looks like the 0x0000005 is working for me on SLI DX11.

 

I tested on the first mission of the "Cold Winter" scripted campaign.  During the start (there are 3 x I16 and 3 x Mig3 at the airfield) my FPS would normally be around 55-70.  

 

With this they were 80-90, riva tuner showing GPU usage around 70-85% for both cards and SLI sync on.

 

No noticeable artifacts but I only tried it for a few minutes.

 

My specs are 2560x1600

i4790k @ 4.6

2 x 980s

 

I will play a bit more later and report back on any further issues.

 

I am retracting all of the above.  There is definitely more stuttering with SLI on the 0x0000005 profile, namely when rotating the view or zooming in.  If you keep shaking your view around you will see your FPS counter dip to around 30.

Edited January 16, 2017 by gnomechompsky

[LLv24_Zami]

If this is true, which it probably is, than you could try turning on the newer "fast sync" option and see what you get, as a last effort. I completely forgot that I currently have AA off and FXAA on.

I can`t get it work, no matter what I do. Just have to wait for Nvidia to do their work.

 

But thanks for pointing out that fast sync option, I am using it now and it`s working very well 

[SCG_Tzigy]

Isn't it possible to enter numbers manually into this field? If I delete the existing dx9 profile info and If I set dx11 line to 0x0000005 (the next line down) it works perfectly for my 980 cards. gpu % is halved for each card for the same frame rate. In my case 60fps. No flicker, no problems.

 

Ok, where is my cookie?!

 

 

I haven't had time to experiment but it looks like the 0x0000005 is working for me on SLI DX11.

 

I tested on the first mission of the "Cold Winter" scripted campaign.  During the start (there are 3 x I16 and 3 x Mig3 at the airfield) my FPS would normally be around 55-70.  

 

With this they were 80-90, riva tuner showing GPU usage around 70-85% for both cards and SLI sync on.

 

No noticeable artifacts but I only tried it for a few minutes.

 

My specs are 2560x1600

i4790k @ 4.6

2 x 980s

 

I will play a bit more later and report back on any further issues.

 

I am retracting all of the above.  There is definitely more stuttering with SLI on the 0x0000005 profile, namely when rotating the view or zooming in.  If you keep shaking your view around you will see your FPS counter dip to around 30.

 

well, it actually worked for me!!!!  SLI is back now!!

 

after DX11 update, i had a decrease in FPS/increase stutter/SLI not working

 

now with the above tweak (cookie for Smok!!!) back on ULTRA, no ssao/hdr, view and grass default (normal), o/w all maxed, win mode, 2560x1600

 

in NCP all defaults/the usual/letting the app cntrl settings

 

geting 100 fps and no stutters!!!!

 

so pretty happy overall.. the only thing is, with dx9 and SLI my card was able to handle 4xview distance better...

[Urra]

The official Sli release whenever it comes, may bring more optimization and handle some of the background aa processing better. But until then this is good enough for me.

 

Zami, ironically the Fast sync not work on my Gsync monitor. Go figure.

 

Edit: stuttering in mp. Turned it off for now.

Edited January 23, 2017 by Smok

[Urra]

After turning off my terrain file I noticed stuttering.  BUT if I turned it back on the stutters are gone.  Zami, I think this might make it work for you -  (it makes or breaks it for me).  Copy and paste the contents into the terrain.cfg file so it looks exactly like below and test.

the file is within the graphics folder in   \1C Game Studios\IL-2 Sturmovik Battle of Stalingrad\data\graphics

 

PixelSize=1  //meters
 
LodCount=10
 
 
[setup]
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
[end]
 
[setup]
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
[end]
 
[setup]
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8 
[end]
 
[setup]
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
        texlod=4096,8
[end]

Edited January 18, 2017 by Smok