Dear all, great so far with v3 I got a big boost on FPS and usage of my 2 GPU's went to over 90% all great! BUT this is if I am using the profile I had got from Rob Ainscough for the v2.5 and adjusted manually with the helpm of:  nVidia Inspector (NI) to remove the artifacts in SLI ... these settings here:  http://www.robainsco...I_Settings.html .

If I use normal nVidia profile from the last driver update the FPS drops a lot and very bad use of my GPU's.

 

What are your experiences so far? BR// Luis.

 

PS I use 2 GTX770

 

 

I use 2 x GTX970´s from EVGA and  first i dont have any issues with async behaviour regarding mouse and menu click from 2.5.

 

i also only use Nvidia control panel software for now.

 

I can crank shadows , AA, and reflections up pretty nicely and very smooth rendering . 

 

But having more FPS in SLI at 1080P is not going to happen with low default settings . Eyecandy up  - but still compromises.

 

If you have a cockpit and wants to move PFD,ND,FMC etc SLI is not the solution . (for now)

 

Michael Moe 

I use 2 x GTX970´s from EVGA and  first i dont have any issues with async behaviour regarding mouse and menu click from 2.5.

 

i also only use Nvidia control panel software for now.

 

I can crank shadows , AA, and reflections up pretty nicely and very smooth rendering . 

 

But having more FPS in SLI at 1080P is not going to happen with low default settings . Eyecandy up  - but still compromises.

 

If you have a cockpit and wants to move PFD,ND,FMC etc SLI is not the solution . (for now)

 

Michael Moe 

Thanks for feedback.

I do have 3 monitors running all the time, one projectot for external view and 2 other for external windows all by using SLI and it works really well and smooth. Just need to give SLI focus to the external view but again with the tweaked nv inspaector settings but not good with the stock from nVidia...

I have a 1920x1200 28" and a 15" 1280x1024 and a VRinsight CDUII FMC.

 

When i want to undock PFD,ND to the 15" monitor having all cables connected to my first videocard i see only a drop in FPS around 1-2fps. (NOT in SLI mode)

 

Now in SLImode the drop is 50% and SLI gets upset using Vsync on or Off.

 

My questions is : Is there any advantage connecting the 15" monitor to my second videocard directly? I know SLI may not work ?.

 

Michael Moe     

I have a 1920x1200 28" and a 15" 1280x1024 and a VRinsight CDUII FMC.

 

When i want to undock PFD,ND to the 15" monitor having all cables connected to my first videocard i see only a drop in FPS around 1-2fps. (NOT in SLI mode)

 

Now in SLImode the drop is 50% and SLI gets upset using Vsync on or Off.

 

My questions is : Is there any advantage connecting the 15" monitor to my second videocard directly? I know SLI may not work ?.

 

Michael Moe     

Me too

SLI in v3 not works with two panels unlocked.

Me too

SLI in v3 not works with two panels unlocked.

Hello Michael and Pincopanco, for me SLI is working in v3 with the manual settings of Rob, I will try to make a small review with pictures or video later tonight to show what I get. If I use nVidia normal driver profile then it goes in SLI but there is a large drop in FPS.

 

Here is my configuration: 2 GPU's GTX770 in SLI, running OrbX + P3D v3 + PMDG 737NGX

 

monitor1 in HDMI GPU1: projector 1920x1080 external view

monitor 2 in DVI 1 GPU1: monitor with 3 undocked panels

monitor 3 in DVI 2 GPU2: monitor with 2 undocked panels

 

With this I get avarage 30-40 FPS unlocked  and for a smooth flight I lock it at 25 FPS 

 

I also tested yesterday without SLI and monitor 1 in GPU1 and monitor 2 and 3 on GPU2 and results looked similar but I need to have time to test more to come with conclusions but looks like although SLI works and both GPUs show a high load it is not an advantage over no SLI.

Hello Michael and Pincopanco, for me SLI is working in v3 with the manual settings of Rob, I will try to make a small review with pictures or video later tonight to show what I get. If I use nVidia normal driver profile then it goes in SLI but there is a large drop in FPS.

 

Here is my configuration: 2 GPU's GTX770 in SLI, running OrbX + P3D v3 + PMDG 737NGX

 

monitor1 in HDMI GPU1: projector 1920x1080 external view

monitor 2 in DVI 1 GPU1: monitor with 3 undocked panels

monitor 3 in DVI 2 GPU2: monitor with 2 undocked panels

 

With this I get avarage 30-40 FPS unlocked  and for a smooth flight I lock it at 25 FPS 

 

I also tested yesterday without SLI and monitor 1 in GPU1 and monitor 2 and 3 on GPU2 and results looked similar but I need to have time to test more to come with conclusions but looks like although SLI works and both GPUs show a high load it is not an advantage over no SLI.

Thanks Luis for your test.

 

I've tried in three ways.

- SLI with 2 monitors with unlocked panels: FPS fall by 50%.

- SLI with 1 monitor: good results, but some stutters.

- 2 monitor with unlocked panels without SLI: excellent results, without stutters.

 

For me, P3D v3 works better without SLI, but I have WIN 10 and the problem could be that.

Thanks Luis for your test.

 

I've tried in three ways.

- SLI with 2 monitors with unlocked panels: FPS fall by 50%.

- SLI with 1 monitor: good results, but some stutters.

- 2 monitor with unlocked panels without SLI: excellent results, without stutters.

 

For me, P3D v3 works better without SLI, but I have WIN 10 and the problem could be that.

Quick question: on the 2 monitors without SLI where did you connect the monitors 1 or 2 GPUs? 

I am still on WIN7

Quick question: on the 2 monitors without SLI where did you connect the monitors 1 or 2 GPUs? 

I am still on WIN7

With two monitors without SLI is mandatory connect one monitor to each individual GPU.

With two monitors without SLI is mandatory connect one monitor to each individual GPU.

Yes off course, you are right...tired here.

I am also having troubles with SLI in P3DV3. FPS 30-30% lower than non-sli, and with many stutters. Using the latest nvidia drivers.

Dear all, after a lot of testing some conclusions!

 

1. Prepar3D v3 SLI works but not at all when undocked windows are used. This had been solved and was working quite well in v2.5. Too bad for the ones that use it. The GPU load on the second card drops nearly to 0%. Closing the undocked brings SLI back immediately.

 

2. SLI even without undocked does not represent too much benefit. From all my testing one single GPU without SLI gives much the same.

 

3. For people that use undocked views, ones with some type of home made cockpits:

a. One single GPU and all 3 monitors give basically the same FPS then if you have 1 GPU 1 monitor and a second GPU with another monitor or two (my case), the load stays mainly in the first GPU.

b. SLI as of this release of v3 is not an option, v2.5 is way better in FPS

c. I moved from 2 SLI GTX770 to 1 GTX970 with all 3 monitors in one GPU and there is a excellent increase in FPS! This is off course comparing the SLI results I have in v2.5 to non SLI in v3.0. Off course we know GTX970 is a quite better perfromer but I would not imagine one alone would be so much better then 2 GTX770 in SLI.

 

So here is my experience. I made a lot of benchmarking and as well some videos to go along but I think the conclusion is what matters. If you are today in SLI like me check out a new single GPU that might give you way more headroom. 

 

PS to conclude I would like to say that v3 experience is just great, no issue of worring with memory (VAS) even in very heavy scenery and airports, just smooth flight experience, best I had in a loooong time!

 

BR//Luis.

Thanks Luis for your very clear and exhaustive testing.

I agree totally with what you wrote and I can also say that it is better to connect all the displays to a single GPU, rather than each individual display to each GPU.

This with the v3, with v2.5 was different.

Now, I find myself with an useless GTX 980, pending modifications by LM.

Thanks Luis for your very clear and exhaustive testing.

I agree totally with what you wrote and I can also say that it is better to connect all the displays to a single GPU, rather than each individual display to each GPU.

This with the v3, with v2.5 was different.

Now, I find myself with an useless GTX 980, pending modifications by LM.

Yep, should we combine our experiences and share somewhere else or in a new topic so that others can see, maybe LM is not aware?

Yep, should we combine our experiences and share somewhere else or in a new topic so that others can see, maybe LM is not aware?

In LM forum there are already a couple of topics on this subject, but LM has never responded.