Solved: Very bad performance after adding a second GTX 980ti

[David Roch 1,975]

Hi gents,

 

Help needed! :-)

 

Since I installed a second GPU in SLI, fps are falling down and P3P is stuttering like never before.

Driver uninstalled using DDU, latest Nvidia 364.51 installed, SLI activated via NCP, shaders deleted, new P3P.cfg created... I have tried everything to no avail.

Both cards are identical, MSI GTX 980ti Gaming 6Gb and are running perfectly well.

 

Is there any specific SLI setting in NI I should apply?

Any help or idea would be very much appreciated.

Thanks in advance!

[David Roch 1,975]

Issue solved.

 

I am using the Opencockpit FMC which is plugged to one of the GPUs.

Resolution is 800x600 when my monitor is native 2560x1440.

It seems this device doesn't like my new SLI rig!

I unplugged it and everything went back to normal.

I have to figure out now how to make it work with double GPUs.

 

BTW I notice a nice improvement on blurries with the SLI.

Frames are gently climbing as well so I am really happy with this (heavy!) investment.

I believe today I can really get the best of P3D is able to deliver to a 32bits platform.

Not perfect but very enjoyable indeed.

:-)

[Michael Moe 494]

I have a CDUII and the FMC within the ngx needs to be undocked and moved. SLI is not happy with that so i am only using it with VFR GA.

 

Michael Moe

[jeansy 338]

Just went thru that myself, what i found that worked well for me was I deleted the p3d.cfg and allowed it to rebuild under the new graphics settings,

 

Works like a treat now

[vgbaron 3,496]

364 is a BAD driver David - go back to 361. 
 
 http://www.tomshardware.com/news/nvidia-driver-364-47-pulled,31370.html
 

Altho that's the .47 - I still would be hesitant.

Vic

[David Roch 1,975]

Just went thru that myself, what i found that worked well for me was I deleted the p3d.cfg and allowed it to rebuild under the new graphics settings,

 

Works like a treat now

 

 Doesn't work for me, thanks anyway ;-)

364 is a BAD driver David - go back to 361. 

 

 http://www.tomshardware.com/news/nvidia-driver-364-47-pulled,31370.html

 

Altho that's the .47 - I still would be hesitant.

Vic

Thanks Vic, will give it a try right now! 

[WebMaximus 372]

364 is a BAD driver David - go back to 361. 

 

 http://www.tomshardware.com/news/nvidia-driver-364-47-pulled,31370.html

 

Altho that's the .47 - I still would be hesitant.

Vic

 

Just checked and I'm running 364.51 and haven't noticed any issues.

 

In what way is this driver bad?

[Cruachan 705]

364 is a BAD driver David - go back to 361.

 

Hi David,

 

Can't speak for the 364 but the 361.91 drivers seem to be working very well for me. If it ain't broke and all that

 

Regards,

Mike

[vgbaron 3,496]

Just checked and I'm running 364.51 and haven't noticed any issues.

 

In what way is this driver bad?

The .47 driver had severe stutters and artifacts. Nvidia pulled it quickly. I assume the .51 is a "fixed" version but I would probably wait for at least one more, unless there's something specific the driver fixed that I needed.

 

Vic

[WebMaximus 372]

The .47 driver had severe stutters and artifacts. Nvidia pulled it quickly. I assume the .51 is a "fixed" version but I would probably wait for at least one more, unless there's something specific the driver fixed that I needed.

 

Vic

 

Ah, I see.

 

Well, the .51 version seems to be working fine so far but will keep what has been said here in mind should I find any issues down the road with this version.

[Michael Moe 494]

Yep latest driver .51 is working great,

 

Remember :

 

SLI and undocked panels is a no go

 

 

Michael Moe

[Fi5kuS 57]

Yep latest driver .51 is working great,

 

Remember :

 

SLI and undocked panels is a no go

 

 

Michael Moe

 

That must be a completely new driver, then? Could be that my horrible performance and stutters derived from the version .47 

[dmarques69 316]

I had blue screens with 364.51, something i never experienced in Win 8.1 reverted back to 361.

[WebMaximus 372]

Hmm...you guys are almost convincing me to downgrade here even when I don't have any problems

 

What version of the 361 drivers do you recommend? I noticed there are three of them (.43, .75, .91).

 

Also I guess it can be relevant what version of P3D you're running...? I'm running Prepar3D_v3_Professional_3.2.3.16769.

[David Roch 1,975]

Yep latest driver .51 is working great,

 

Remember :

 

SLI and undocked panels is a no go

 

 

Michael Moe

Well, I've been out of the business for too long and I forgot this one.

You are right Michael.