Mig-21 FPS Drops, unplayable, video added...

[cronustr75]

Hi guys,

 

 

Here is the video, only Mig-21 module is having fps drops by now. System specs are in video.

 

Best Regards.

[cronustr75]

New statement. When radar is off, fps drops does not occur.

[Hiromachi]

I will investigate that. I know that radar is scheduled for some recoding to improve general performance so perhaps this may solve the problem.

[bf109hartmann]

I have the exact same problem and the FPS returns to normal immediately after the radar is switched to off or to standby. Looking forward to a fix.

[rossmum]

A mate of mine with a much more powerful PC than me has also reported a drop from 150FPS to 40 when the radar is turned on. My potato PC doesn't seem to register a difference at all, though.

[stratojet]

In my case, this failure occurs when the radar is pointed at the ground. ¡What a pity!, it's an excellent module, but in this state it's not usable. :-(

[AeriaGloria]

Are you all on stable or open beta?

[rinkerbuck]

Same problem, open beta. It doesn't seem to always occur but when it does its super obvious, unplayable, and as soon as you turn radar off things go back to normal. I'm pretty sure its only happening when the radar sees ground clutter.

[rossmum]

OB here. Like I said, I notice no difference - my framerate is perpetually low in multiplayer and especially any time I go near trees, but I haven't noticed a significant impact from the 21's radar. My friends who have are all running OB as well.

[HunterICX]

I notice perhaps a 5 - 10 FPS loss flying through the canyons and just above the tree tops through the mountains when turning the radar off or on. So my FPS jumps between 65 - 80 when having the Radar on flying throug the Georgian mountains covered with trees.

 

 

 

R7 2700X , Vega 64, 32GB Ram. DCS Settings high (4xMSAA, SSA = Off ). 1920x1080

 

 

From all the modules even in crowded MP servers I get the most FPS flying the Mig21.

[applesinduck]

I have the same exact issue and I'm pretty sure that this has to do with the ground clutter simulation. It happens every time when I nosedive into the mountains.

[falopa]

same issue here! the fps loss start when turn on the radar

 

with the f/a-18 something similar happen when turn on the radar and the SA page

 

maybe is something with de nvidia drivers, a friend with amd gpu don't have this issue

[GrislyAccord]

Came here to report this.

 

I get around 100 fps ordinarily...until I turn on the radar, then it drops significantly (as low as 15) but becomes pretty much unplayable at that point. It's like looking at a flipbook animation. Makes me nauseous.

[Al-Azraq]

I started learning this module and this happen when radar is on and close to the ground.

[andqui]

I just hopped in the Mig to see if there were any FM changes with the open beta that came out today, and had this radar performance problem. In the A2A missile training mission and the "free flight" mission, FPS is steady locked at 60 fps with the radar in standby, when I turn it on it immediately tanks to 20 or so. I don't recall this happening before the patch that came out today, but I hadn't tested it in a few weeks.

[CrazyGman]

Same problem

 

I'm also having my framerate drop when the radar is on and i'm picking up ground clutter. I also have had the problem in the F/A 18 with a fps drop there when the radar and SA page is on as well, turn them off and everything is super smooth again

[-IRRE-Rolluptito]

Same here. I go from 60 to 15 fps when I turn on the radar not far from the ground.

[Shibbyland]

Exact same issue, also related to RADAR. I didn’t have this issue several updates ago and funnily enough I’ve doubled my RAM to 32gb and got a way better GPU since then. Unplayable with this issue.

 

Does the MiG 19 have this issue with the RADAR?

[HunterICX]

I'm on a AMD Vega 64 GPU and I don't have a problem at all with the radar as I stated earlier in this thread, is anyone else with a AMD GPU have the same issue? A couple of friends have the same issue running Nvidia 1050 and 1080.

Edited April 21, 2020 by HunterICX

[rossmum]

I'm on a 1050ti and haven't noticed any impact, let alone severe enough to render the game unplayable. Seems almost random who's affected and who isn't... wonder if a specific setting is causing it?

[Shibbyland]

The issue occurs only when using RADAR and even then only when the RADAR is getting lots of returns (so terrain and cloud). It ceases at high altitude or when the nose is pointed up so as to not show ground returns.

 

I've just finished experimenting with different settings to see if I get any results. Here's what I found:

 

I generally have my settings on high and achieve framerates in the region of about 120 fps with drops to about 70 momentarily here and there. With the RADAR selected on, the frames drop as low as 22 FPS.

 

I reduced all settings to low, reduced clutter/grass to the minimum level, reduced trees visibility to near minimum level and reduced the preload radius to 50% of max value. I reduced anisotropic filtering (essentially I set it pretty much as low as I could). The results with RADAR OFF were an improvement to an FPS of about 190. HOWEVER, with RADAR ON the framerate still dropped to around 22 FPS.

 

In summary: For me, settings made absolutely no difference to loss of framerate with RADAR on.

 

I have the following hardware:

 

CPU: i5 6600K 3.5 Ghz

32GB RAM (mid range quality, purchased in January 2020)

GPU: NVIDIA GeForce RTX 2060 Super

500GB SSD with 260GB free space

 

I do not have framerate issues with any other module. I'd really like to see this get fixed. I can't use the MiG 21 with this issue.

 

EDIT: The MiG-19 RADAR has somewhat of an FPS drop too but nowhere near as bad. Reductions are noticeable at low level but only go as low as about 70FPS with the occasional drop to 60. This is at high settings. Also, RAZBAM have given us the option of changing the RADAR display in the MiG-19 from 'dynamic' to 'static' because they know ground returns cause FPS drops, particularly on low end systems. To my knowledge, this option is not available on the MiG 21, perhaps it should be.

 

With that said, it looks like these CRT type RADAR displays are quite taxing but for whatever reason the MiG 21 seems to be the worst. I don't know anything about developing aircraft modules but if the A-10, Tomcat, F-18 etc can display complex video for targeting pods and weapons without performance issues, surely a more simple looking display such as these CRT RADARs without performance drops is achievable.

Edited April 22, 2020 by Shibbyland

[ALLynil]

Same here running 90ish fps when i turn radar on fps it drops to 70 then slowly drops to 40 and immediately resets back to 70 slowly droping again to 40 in a constant loop. Is there any fix or devoleper posted any infomation about this and possible fix? I can understand the drop to 70 that is ok but why does it keep droping and resetting is beyond me. This is serious bug and need to be repaired asap.

 

Any other module runs great. I get fps drop while using harrier flir but hey i get that one. Pip always bring same fps drop.

[rinkerbuck]

Same here. Can anyone find any info where the developers respond? The official bug tracker doesn't seem to have any updates from them since last year.

[Shibbyland]

I have seen a response in another thread I started a couple of days ago before I saw this thread.

 

Hiromachi says they are aware of it. I’m not sure about a fix. Since it also happens to a lesser degree on the MiG 19 I think they’re not sure whether it’s a module issue or a broader DCS issue.

 

I didn’t used to have this problem with the MiG 21 and back then I had a much inferior GPU and half the RAM I have now. Somewhere in the last few updates this has happened so I would have thought it’ll be fixable.

[AcidMind]

Solution to FPS drop when radar is ON for Nvidia graphic cards:

 

Revert drivers to version 436.48. This solves the problem.

 

 

 

https://www.nvidia.com/Download/driverResults.aspx/152007/en-us

 

Hope this helps developers too :)