Looking forward to your reports on the Titan X and if it is much better than I might have to  sell my new 1080 and go for one. 

The older nVidia drivers DO WORK well with SLI and P3D, just not the newer nVidia drivers.

 

Cheers, Rob.

 

Yeah but having to hold back on drivers could have knock-on impacts to other games.  I'm keen to run concurrently with X Plane too and that doesn't utilise SLI.  So I'm regretting the decision really - but should break even selling my two 1080s and getting a Titan X Pascal.

Yeah but having to hold back on drivers could have knock-on impacts to other games.  I'm keen to run concurrently with X Plane too and that doesn't utilise SLI.  So I'm regretting the decision really - but should break even selling my two 1080s and getting a Titan X Pascal.

 

The unfortunate part is that while the older drivers do work with SLI and P3d, they won't work with newer titles like Battlefield 1. I have two Asus 1080 STRIX cards and I am really starting to regret my purchasing decision. Is Nvidia seriously walking away from SLI support?

 

 

The unfortunate part is that while the older drivers do work with SLI and P3d, they won't work with newer titles like Battlefield 1.

 

That's a true PITA. Dare I mention the most archaic of solutions?

"Is NVidia seriously walking away from SLI support"

 

Somehow I doubt it. Quote from nVidia's own website:

 

GEFORCE GTX SLI HB BRIDGE

NVIDIA’s new SLI bridge doubles the available transfer bandwidth compared to the NVIDIA Maxwell™ architecture. Delivering silky-smooth gameplay, it’s the best way to experience surround gaming—and it’s only compatible with the NVIDIA TITAN X, GeForce GTX 1080 and GTX 1070.

 

My own theory is that they may be struggling with the new technology as applied to existing games, never mind any new titles. Again, I think we will just have to be patient until it all gets sorted out. I for one will not be ditching my two GTX 980Ti's anytime soon. The experience in P3D 3.4 is just too good....and without the need to resort to any 30Hz tricks to ensure fluid stutter-free performance. It's easy enough to switch off SLI when a title demands it. In fact, this may already be happening to some extent behind the scenes. All you need to do is monitor GP activity to see when both cards are active and sharing the load. To me, one of the advantages of SLI is never seeing my cards, while working together, running much above 80-90%. Consequently water cooling is not needed as card temps under maximum load in my HAF X case rarely rise above 70 degrees C.

 

Like Rob, I'm not using the latest drivers. I forget which driver set is installed as I'm not at my gaming PC right now, but it's a few versions before the one mentioned in the thread subject title.

 

I think nVidia have rushed out their new cards knowing that driver support is still under development. Indeed, driver support is always under development. Perhaps it's now simply becoming harder to keep up.

 

Battlefield 1 is an example of a recent title and appears to run fine on DirectX: 11.1 Compatible video cards or equivalent. As long as GPUs have built in SLI capabilities then there will be a demand from those keen to stay at the cutting edge of what is possible from current technologies. Yes, it's expensive and as such will restrict the market to those unwilling (unable?) to resist that ever-present and compelling urge to satiate their needs and/or have the necessary surplus funds to support their objectives. Nevertheless that market, however small, is certainly there. Consequently, and for the foreseeable future there will be unrelenting pressures on nVidia to service both this selective sector while continuing support for their mainstream customers.

 

Mike

I think GPU and CPU technologies are currently approaching a plateau in performance. If I refer to the Passmark benchmarks for high end GPUs and CPUs my chosen hardware is still up there with the best. Indeed, performance-wise two 9 Series cards, properly used in SLI, will likely match if not exceed the performance of their 10 Series single card successors.

 

http://www.videocardbenchmark.net/high_end_gpus.html

 

http://m.cpubenchmark.net/high_end_cpus.html

 

On the CPU front Intel seem to be trying to maintain their competitive edge by increasing the core count on their chips. Yet it wouldn't surprise me if my 8-cored i7-5960X running at a stable 4.4GHz will be approaching the performance of an unclocked 10-cored i7-6950X running at 3GHz. Also, I doubt whether the latter chip will offer much more for a CPU constrained P3D unless it too is overclocked.

 

Mike

Your sort of correct. My three 980's were a bit stronger than my single new 1080 but,,,and it's a big but (sorry) - my 1080 runs around 60 degrees full out while my three 980's would climb to almost 80 if I let them. One 1080 runs almost as good as three 980's and a heck of lot cooler. 

I think GPU and CPU technologies are currently approaching a plateau in performance

 

 

I understand the point you are making, but even though GPU technologies are plateauing, it is still possible to eke out more performance by using CUDA and moving tasks from the CPU to the GPU.  LM has been doing that with P3d and probably will continue to do so in the future.

 

Basically, the peak in desktop/server technology is/was represented by the multiple CPU Intel server boards. The trouble is that no gaming apps could take full advantage of systems with two or three CPUs each with 4 to 8 physical cores.

So to summarize, at this point in time, in order to get SLI working in P3d I need to roll back to an older driver, which newer games do not support.

 

Kind of off topic, but Rob, I wanted to thank you for putting this page together. It has been tremendously helpful to me as I navigate through optimizing my P3d settings. 

 

http://www.robainscough.com/Prepar3D_Settings_2.html

 

 

Ok back on topic: (Sigh), I am looking forward to a 64bit version of P3d with a good multithreading architecture. I think we will get more performance gains from that than anything else. 

 

Based on these results, I am not sure I am ready to jump to a Titan X Pascal(yet):

 

https://www.youtube.com/watch?v=Wg5QhQPswEg

 

https://www.youtube.com/watch?v=BcdYzsFLXds

 

 

It looks like a GTX 1070 in SLI performs better as well:

 

https://www.youtube.com/watch?v=GUet375VZbk

That is interesting. Still looking forward to reports of single TitanX Pascal in P3D before deciding.

Rob I think you can change the "SLI compatibility bits (DX10+DX11)" number in Nvidia Inspector. Replace the bit number for the new drivers in Inspector with the working older drivers bit number. 

 

 

That is interesting. Still looking forward to reports of single TitanX Pascal in P3D before deciding.

 

Have been doing some XP11 testing, will be testing Pascal in P3D today ... using Orbx new Catalina release ... will also load up my original base test that I've done over the years so as to get a good compare including long frame count.

 

Cheers, Rob.

some one did install the last : 376.33 ?

branch of 375

may be correct sli and flickering  issue 

still there no improvement

While I consider upgrading to a GTX 1080, I'm still driving two GTX 780's in SLI.  I did recently make a driver upgrade, and now I get stutters/10fps in P3D 3.4.   What is the last driver that worked well?  

 

I'm also frustrated that while the 780 OC'd is just as fast as a 980, and I have two 780's, apparently I cannot run a rift with ATW or ASW because NVidia didn't push that to the drivers for <900 series, even though it should work on any Maxwell.  I'll definitely be trying to disprove that when I get a rift here soon, but I see I may be forced to go to a 1080 for any VR joy.  But I digress.

 

373.06 or 375.86?