Framerate problems

[mit97]

I just downloaded dcs world and went into a training for the frog foot with all max settings thinking this game is fairly easy to run

 

i have 2x 7770's in crossfire in my system with an amd six core

 

i went into game and only had around 18 fps for some reason

then i lowered the setting to the absolute worst settings possible and still had around the same frame rate

 

if anyone knows how to fix this please try and help

:helpsmilie:

[Madone]

Hi,

What's your motherboard? Asus? I've had the same problem, Asus Suite crap was locking my CPU frequency to 1.6Ghz, so I was having 13 FPS... Maybe something like that is happening to you?

[mit97]

I have a TA990FXE Biostar board

 

are there any special setting i should turn off that make the game really hard to run?

Edited January 3, 2013 by mit97

[shagrat]

There were issues with "crossfire" aka linked GFX boards. Not sure this is still a problem, but if nothing else helps, try running with only one 7770 to check for root cause.:huh:

 

EDIT: Be aware that DCS is CPU heavy! It is advisable to go for high CPU frequency, 3.2 GHz or higher at least...

Edited January 3, 2013 by shagrat

[shagrat]

...and the mother-of-all-threads about performance tweaking: http://forums.eagle.ru/showthread.php?t=68060 :smartass:

[King_Hrothgar]

Similar issues here. My system is a fair bit less impressive, but altering graphics settings has virtually no impact on performance. My system is win 7 64bit, 8GB RAM, Radeon 6850 1GB, Phenom II x4 3ghz. I get between 5 and 60 fps, average is around 15 when just flying around in the Ka-50 at tree top level. Goes to around 20-25 higher up. External views don't really change it until I zoom out so far the chopper goes to it's lowest LOD, at which point it jumps to 60 fps (limiter).

 

For lols, I compared absolute max detail to absolute lowest (including resolution). The difference was 15-25 fps went to 18-28 fps. You'd think the difference between 1024x768, no AA, no shadows and so on and absolute max (1920x1080) with 16xQ AA would have more of an effect. But it didn't.

 

For comparison, I get about 40 fps in RoF, 45 in CloD both using medium-high settings.

[Haukka81]

It is just same old dcs crapy engine. My 3570K and 6870 wont run it maxed out.. and thats just LOL :D

 

Well least i have rof that looks great,runs great ..

[Rhinox]

I'd say if changing gfx-settings does not have impact on fps, then your bottleneck is something else, probably cpu. You have AMD graphics, so try to download & run "AMD system monitor" in background. It will show what (cpu, gpu, ram, or gfx-ram) was maxed out while running DCS...

[King_Hrothgar]

If CPU is the bottleneck then simply pausing the game should cause the fps to jump through the roof. But it doesn't, it has zero impact for me. It's clearly related to the aircraft models. Simply zooming out so that they no longer appear as anything more than a few pixels results in instant 60+ fps on my system but drops to the teens when zoomed in or in cockpit. My system isn't the greatest, but it blows away the "recommended" system specs. I can't even imagine trying to run it on their minimum. You'd have to count seconds per frame rather than frames per second.

[EtherealN]

It is just same old dcs crapy engine. My 3570K and 6870 wont run it maxed out.. and thats just LOL :D

 

While my 2600K and 560Ti... does. ;)

(With around 50FPS, windowed mode.)

 

Not saying your problem is imagined, just that there are many things that can cause issues. When it comes to the OP, the crossfire is a very likely culprit. Crossfire doesn't like DCS, and there really isn't much ED can do about this; AMD needs to actively support it to get "proper" results. And obviously, it's a good question of whether it's worth the effort for AMD since DCS is definitely a niche product.

 

If CPU is the bottleneck then simply pausing the game should cause the fps to jump through the roof. But it doesn't, it has zero impact for me. It's clearly related to the aircraft models. Simply zooming out so that they no longer appear as anything more than a few pixels results in instant 60+ fps on my system but drops to the teens when zoomed in or in cockpit. My system isn't the greatest, but it blows away the "recommended" system specs. I can't even imagine trying to run it on their minimum. You'd have to count seconds per frame rather than frames per second.

 

Do you have FRAPS?

 

If so, could you make two tracks - one where you fly on empty map (needs only be like one minute long), and another where you also have something there that causes the slowdown. With FRAPS you can then record frametimes (note: not only a min/max/avg, FRAPS can output an excel file with actual frametimes which helps a lot in this case).

 

I can then compare on my system to see if the same behaviour is here also, which will hopefully help localising the problem. I agree that model LOD is a very possible culprit.

[King_Hrothgar]

Here are two tracks with the associated fraps logs. I had to change the file types to txt to upload them, csv is an invalid file type as far as the forums are concerned. Anyways, the only difference between the two tracks is one has nothing but my su-25t and the other has that + some tanks slugging it out at the same airport. The airport is Sochi, though the FPS death is universal as far as I can tell. I get similar fps to the "battle" track on any sort of combat mission, even ones with nothing but open fields around. FPS is slightly lower with the Ka-50 but I didn't include those tracks. It doesn't seem to be just aircraft models doing it. The more detailed ones like the Ka-50 and Su-25T certainly have a big impact, but that isn't what seems to be crippling it. Seems to be the combination of smoke, vehicles and certain buildings (namely the hardened hangers but there are others).

 

Settings used were straight medium switch, 1920x1080 resolution, mirrors off, birds off, no brush/bushes, 8km trees, 80km preload. That said, the fps is basically independent of settings. I can run it on absolute max with 16xQ AA and it wouldn't take more than 1-2 fps off. Going for absolute minimum, including res has a similar effect. I hope this helps.

 

Oh, and why yes, yes my max fps is 110+ with a minimum around 9 depending entirely on which direction I'm looking. That is not a fraps glitch!

Edited January 8, 2013 by King_Hrothgar

[maxmax]

I had trouble with fps. I still do, while running my amd at 3,9 ghz. Goes down to 12 in certain situations, but normally has a low of 18 or 20. At 4 ghz it was significantly better, but that gave me trouble with heat and bsod.

For some reason just a few mhz gives big improvements in fps as dcs is very cpu-heavy. Or, this is my experience. Anyone else noticed the same?

[EtherealN]

Thankyou greatly Maj_Death. I will make sure to run the same test on my machine and see if the same thing occurs here. I'll then see if there is something I can "tweak" to make it stop happening.

[SkateZilla]

Artillery has always caused a FPS Hit here. from 90 or so down to 45,

 

on my other system it takes it down to sub 20. from 50 or so.

[Madone]

Strange, I'm playing a mission with some MLRS and the FPS are not dropping when they're firing, I play the same mission since 1.1.1.1 though. Maybe I should try with more cannons.

[doveman]

If CPU is the bottleneck then simply pausing the game should cause the fps to jump through the roof. But it doesn't, it has zero impact for me. It's clearly related to the aircraft models. Simply zooming out so that they no longer appear as anything more than a few pixels results in instant 60+ fps on my system but drops to the teens when zoomed in or in cockpit. My system isn't the greatest, but it blows away the "recommended" system specs. I can't even imagine trying to run it on their minimum. You'd have to count seconds per frame rather than frames per second.

 

I've found I get substantial drops on the ground at an airfield looking left or right so that other aircraft are in view, when another aircraft flies in front of me and just generally around airfields, so I might get 40fps away from the airfield and it drops to 25fps as I approach it, so I think there is an issue with the models as you say.

 

http://forums.eagle.ru/showthread.php?t=94917

Edited January 18, 2013 by doveman

[skarden]

I'm in the same boat, I've a fairly top end system ( details below ) and my game runs at around about 30 - 35 fps, it actually runs worse then my old system which of course seems quiet strange, my settings are pretty much the same except my resolution which is now 2560 x 1440 for my new monitor as opposed to 1920 x 1050 ( I think ) on my old system.

 

initially I had most settings pretty high as I figured my rig would smash it but thats not the case and now I'm lowering things to try and find where the sweet spot, it's a little disappointing to be honest that DCS can't seem to take advantage of newer systems.

 

Of course if anyone has any suggestions for optimizing it I'd be very appreciative.

 

Intel Core i7 3930K @ 4.6GHz

ASUS Rampage IV Extreme Mobo

Dual 2GB GDDR5 Nvidia GTX 680

32GB Corsair Vengeance DDR3 1866Mhz

Creative Sound Blaster Recon3D Fatal1ty