Huge difference in VR performance from F-16 to F/A-18

[Notso]

I made an interesting discovery today. I was pulling my hair out trying to get my Reverb and system set up to run the F-16 module smoothly. I was getting horrible frame rates anytime I was near a dense city - Abu Dhabi, Las Vegas, etc. So I was running multiple test runs using the F-16/Instant Action/Free Flight scenario. I even rolled back to 2.5.5 OB assuming that it was 2.5.6 that was causing the issues. I saw a minor improvement in 2.5.5 but still really crappy frame rates in VR. I tried all setting combos as possible from low to high across the spectrum of adjustments such as NVIDIA control panel, Steam VR, and DCS settings. Anytime I was near a city with the F-16, the frame rates and GPU and CPU performance were maxed out on a high end system (see my specs below).

 

Just as a comparison, I just flew the Hornet across the same flight path over southern Las Vegas in 2.5.6. TOTALLY different outcome. I had stable 45 fps throughout without a hiccup and buttery smooth scenes through the HMD even with the settings fairly maxed out Motion Smoothing in Steam VR @ 150%, MSAA x2, Visibility ultra, AF 8x, etc).

 

See the attached screen grabs with the different performance #s: Why is the F-16 so much more of a resource hog than the F-18? Is this a known bug?

 

It wouldn't allow me to repost the screen grabs since I already added them in another thread. But here are the links to the pics:

 

F-16 screenshot: https://forums.eagle.ru/showpost.php?p=4264122&postcount=19

 

F-18 screenshots: https://forums.eagle.ru/showpost.php?p=4267397&postcount=32

[BMGZ06]

Yup I have noticed the same issues with the Viper. I stopped flying it for now. I get better FPS in the Tomcat but the Hornet is still better overall. It must be the development time into the Hornet being a more settled flight model but I know the FLIR can cause issues for me sometimes with FPS in certain areas on PG map and Nevada. My rig is very similar to your so there shouldnt be much difference in performance between what we both get.

[RuskyV]

I wonder if the TGP is rendering in the mfds even though there might not be one fitted? I remember in the past there was an issue with A10c doing exactly that and causing large frame issues.

 

Might be worth investigating