FPS is low from one moment to the next, but when I open the task manager the fps increases

[Lord258]

First of all, I want to apologize for the fact that I don't speak English and I can't know if there is already a topic of this kind or not.

Everything goes well at the beginning, when performing the startup, taxiing, and taking off and climbing up to 30,000 feet, but when doing missile evasion maneuvers, and I go down to 10,000 feet the FPS is around 50-55 and my normal FPS is 120 FPS.
The strangest thing is that when you open the task manager, this is all solved, any solution? This problem has been going on since version 2.8.
Most played server: ShadowReapers PvE Caucasus
Plane: F-16

 

Settings:

System:
Asus tuf z690 plus d4
i5 12600k
32gb ram g.skill tridentz rgb (4x8)
asus tuf rtx 3060 ti gddr6x

Peripherals:
VKB Gladiator NXT EVO Standart
Thrustmaster TWCS
TrackIR 5
DCS-BIOS (arduino nano, 3 buttons, 4 switch, 6 LEDs)

Edited January 5 by Lord258

[ngreenaway]

It seems this is a widespread problem. I was fine until last week when it finally started happening to me. Switching to any window outside DCS & coming back brings GPS to normal, but only for a little while 

[Lord258]

14 hours ago, ngreenaway said:

It seems this is a widespread problem. I was fine until last week when it finally started happening to me. Switching to any window outside DCS & coming back brings GPS to normal, but only for a little while 

I'm less sad that it's not my pc settings then, but I'm also not happy because it's a very annoying problem...
hopefully it will be resolved in a fix or in DCS 3.0

[Dangerzone]

it's my (limited) understanding that task switching out can do a couple of things:

Firstly, certain input peripherals (keyboard, mouse, etc) may no longer be tracked by DCS during this time as the 'focus' has gone elsewhere. This may be freeing up some CPU resources in DCS (in which CPU bottlenecking can be a larger player when it comes to frames than even GPU. I was myself CPU bound with dips down to 15fps the other night in DCS with a 4090 running it in 2D while only in the mission editor - not flying - so there's definitely something going on there).

The second thing is that I've been told (not sure how accurate) - that when you switch to another program, windows can free unused memory/buffer in the GPU's memory (and who knows - probably CPU as well?) - which may be making room for DCS to use more of these resources. 

There's a mountain of things that could be causing this, and it may be a different cause from one user to the next - even if the symptoms are similar. Given as NGreenaway has stated - it is a widespread (and long time) problem - my hope is that it's resolved with Vulkan when it's released. Until then - I'm afraid we're left to find a way to manage it ourselves. 

[sleighzy]

19 hours ago, Dangerzone said:

The second thing is that I've been told (not sure how accurate) - that when you switch to another program, windows can free unused memory/buffer in the GPU's memory (and who knows - probably CPU as well?) - which may be making room for DCS to use more of these resources.

This is a pretty common solution for VR players when they get FPS drops due to having used the F10 map (which loads in all textures around that area) and is the current hypothesis that this is freeing up VRAM resources.

[Loukuins]

It's the same issue discussed here