[Official] DX9 vs DX11 performance difference

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dadaboomda said:
Warning :

I specified in what circumstances the problem was greatly amplified :

Use of AI (the more there are, worse obviously)
AND / OR
Time of day or the sun is low (but also when the circuit is pretty ...)
AND / OR
When the rain starts (it rains at least 30% of the time in my weather scripts ...)
AND / OR
When the track is wet and especially when the water is "raised" by the AI
AND / OR
When the AI lights are ON or even mine
AND / OR
When I use the virtual mirrors even with only 60 meters of sight and without the smoke and particles (worse for the real mirrors).

I forget things necessarily.

But just imagine 10 AI in front of me, with their headlights, the rain, the water of the track "flying" behind 10 AI, the morning at 8 o'clock (low sun) and the need to put at least 1 mirror for avoid contacts ... there really in this condition not so infrequent as that, where I could have 60 FPS constant with absolutely everything off or in LOW, but in 4K / full circuit details / full texture details / anisotropic X16, I have catastrophic performance even in 3K without AA and really ALL of OFF even the circuit details etc.).

For an i5 2500K OC, 16 GB of RAM, GTX 780 OC + 20% : it's really unacceptable (I think).

I had found a correct solution before ... but that was before using AI. I do not want to drive without AI, which is legitimate.

Let's wait for the release, let Christmas pass :

On the other hand I would seek the help of S397 after. The help of the people in the forum is really great, but I think it's the people who work on the graphics engine at S397 to answer with a maximum of advice ... even if a manual well done that would not take them dozens of hours of work would be better ..........

Let them send a release and enjoy the end of year celebrations. I would ask them after ;) .
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stonec said:
All people who made the detailed tests (by that I mean a graph or absolute number, not just a hunch) in this thread have reported less FPS in DX11 (some are very close to DX9, but still less). The only report I have seen of more FPS in this thread is from Ari running in SLI, which isn't surprising considering that SLI was 100% broken in DX9 rF2. There were a couple of users like @patchedupdemon who claimed they got much better results in DX11, but when they re-ran with proper benchmarking they found it not to be the case.
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I was within 7-10 fps if I can remember,that to me is just fine
 
lagg said:
Hey guys, calm down!
I don't say that there is not a problem.
One guy has said that ALL PEOPLE have the problem, and this is not true.
Thats all.
I had that problem in the past, but fortunately i could buy a new pc and i don't have this problem nowadays.
I respect all people who have work to post all data to show the problem.
I apologise If have offended someone.
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This sentence suggested that it wasn't a serious performance problem and considering the big percentage of people affected I consider it a major issue. Today the dx11 mainstream beta has finally arrived. Some users simply cannot benefit from those nice rain effects.
lagg said:
If this were true it would be a serious perfomance problem, but depends on many things.
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lagg said:
Hey guys, calm down!
I don't say that there is not a problem.
One guy has said that ALL PEOPLE have the problem, and this is not true.
Thats all.
I had that problem in the past, but fortunately i could buy a new pc and i don't have this problem nowadays.
I respect all people who have work to post all data to show the problem.
I apologise If have offended someone.
Click to expand...

"I had that problem in the past, but fortunately i could buy a new pc and i don't have this problem nowadays."

Yeah... but we bought a product that worked good in our computers because we tried the demo and was working good. Now, if some people have to update their PC only because DX11 is not properly optimized... then I don't know what to say.

I didn't try the new build yet, I will talk when I try,
 
I completed benchmarking for today's build and turns out this is the first build since July that brings performance updates, kudos to that!

I have included my old results and updated ones in below graph. Improvement is 7-10% and for the first time DX11 performance ever so slightly surpasses DX9. With a grid of 20 Radical GT3's at Matsusaka I can now just achieve 60 FPS with shadows on high. Previously max was 54 FPS.

rF2 charts December.png
 
Ok.... THANK YOU STUDIO 397, REALLY TRANK YOU, NOW I WENT FROM 60 STABLE FPS TO 20 TOTALLY UNPLAYABLE FPS. NOW I AM RETIRING FROM ALL THE RF2 LEAGUES I WAS RACING BECAUSE MY GAME IS TOTALLY UNPLAYABLE. REALLY THANK YOU FOR MAKING MY GAME GOING FROM 60 FPS ULTRA GRAPHICS TO 20 FPS LOWEST SETTINGS. NO EXCUSES, I CLEARED CBASH AND SHADERS AND MY GRAPHIC CARD IS R9 280 WHICH IS 100% READY TO RUN DX12 GAMES SO ITS RIDICULOUS I AM HAVING THIS PERFOMANCE WITH DX11.

Sorry for caps but I am really angry now because I already uninstalled the game and left the leagues I was drving because I can't drive this.
 
No surprise with the new Build. Performance drop compared to the current version of DX9 on my system is 20%. I have returned to DX9 to perform some tests and confirm results. AA is offering very different results in DX9 and DX11, so I have chosen to deactivate it and obtain more reliable results.

dx9 vs dx11.png

@stonec Could you do the test with the AA deactivated? In DX9 and DX11 it seems to be working very differently. Much more consumption of resources and worse result in DX9.


Performance in rain is pretty bad. Using a configuration with which I get about 90FPS in race with dry track, in water the performance is around 35/40FPS with drops to 25FPS. Unplayable in rain with this performance.
 
ceecee said:
In reply to your Windows Update problems:
1. Restart PC
2. Empty all files you can in C:\Windows\SoftwareDistribution\Download
3. Download and run Windows Update Troubleshooter as Administrator (https://support.microsoft.com/en-us/help/4027322/windows-update-troubleshooter)
4. Run Windows Update again.
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Turned out I was updating via the settings/update security app and windows was trying to update as well with the windows 10 update helper.
Two instances were causing the updates not work.
All good know though,so far,touch wood.
Thanks for your reply
 
Sorry for my last message, I tried some recommended graphic options and reinstalled + updated graphic cards drivers and now it runs better, but... you have to take a serious look into the rain perfomance because as another user already reported, the FPS in rain are about 50% worse than in dry, something that never happened in DX9.

See you.
 
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From Discord, I think a few people need to understand exactly what DX11 is all about and Marcel explains it here:

Marrs - Today at 11:30
The point of DX11 is that we can implement better graphics and support VR. Of course if you enable all those features it will put a heavier load on your GPU. In that sense there is nothing magical in DX11 that will make everything faster. I do believe that if you turn down the graphics until they are on par visually with DX9 you will end up with very similar performance. Obviously with millions of different system configurations, we can never be sure in every case.
 
Is it generally agreed upon that GPU loads are the issue? I'm finding the CPU taking a huge hit with DX11 builds. Or, do they go hand in hand?

Could run good sized fields of most mods on DX9 on fairly aggressive graphic settings (i5-750 w/GTX570). DX11 I've got to go way down on the quality and effects and will still be limited to a handful of AI before the CPU starts falling out of real-time in various spots on track.
 
MarcG said:
From Discord, I think a few people need to understand exactly what DX11 is all about and Marcel explains it here:

Marrs - Today at 11:30
The point of DX11 is that we can implement better graphics and support VR. Of course if you enable all those features it will put a heavier load on your GPU. In that sense there is nothing magical in DX11 that will make everything faster. I do believe that if you turn down the graphics until they are on par visually with DX9 you will end up with very similar performance. Obviously with millions of different system configurations, we can never be sure in every case.
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We understand that Marc. But without enabling any post processing effects it drops performance which obliges to further reduce graphical settings.


The same example can be applied for rain effects. If perfomance is reduced to half when enabling drops, who is going to use it? Shall we reduce other effects so that we can turn rain effects on? It doesn't make much sense IMO. It is like working on things that only a few can really enjoy.
 
SPASKIS said:
We understand that Marc. But without enabling any post processing effects it drops performance which obliges to further reduce graphical settings.


The same example can be applied for rain effects. If perfomance is reduced to half when enabling drops, who is going to use it? Shall we reduce other effects so that we can turn rain effects on? It doesn't make much sense IMO. It is like working on things that only a few can really enjoy.
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They are working on things that will bring the graphics upto 2018 standards,maybe we should also upgrade our hardware to those standards too.
Everything moves on its life
 
stonec said:
I completed benchmarking for today's build and turns out this is the first build since July that brings performance updates, kudos to that!

I have included my old results and updated ones in below graph. Improvement is 7-10% and for the first time DX11 performance ever so slightly surpasses DX9. With a grid of 20 Radical GT3's at Matsusaka I can now just achieve 60 FPS with shadows on high. Previously max was 54 FPS.

View attachment 11626
Click to expand...

Stonec... you make a very good job.
You're the user forum of the year ! :)
 
MarcG said:
From Discord, I think a few people need to understand exactly what DX11 is all about and Marcel explains it here:

Marrs - Today at 11:30
The point of DX11 is that we can implement better graphics and support VR. Of course if you enable all those features it will put a heavier load on your GPU. In that sense there is nothing magical in DX11 that will make everything faster. I do believe that if you turn down the graphics until they are on par visually with DX9 you will end up with very similar performance. Obviously with millions of different system configurations, we can never be sure in every case.
Click to expand...

mmm... No. Sorry but I don't agree with this. DX11 is having less perfomance in most of the systems using exactly the same settings as DX9, something that reflects that its not properly optimized. At this momment, I can say that the most important work that should be focused on is to fix the FPS issues with the new rain as using Medium Rain Drops is taking 50 or 60% of the fps compared to dry. I know its not easy for you but I don't want better graphics if they will come with less perfomance, give me better physics and I will enjoy them much more than some rain drops in the body of the car.

And... sorry but I think that a R9 280 graphic card which can run 2014-2016 games on ultra settings is beastly enough to move it at least 60 stable fps, specially when we remember this game was launched in 2012.
 
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