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0 votes
asked by (16 points)
I continue to have Low frame rate issues.  I have it installed on a SSD with PC specs below but my MAX frame rate that I am able to get on the LOWEST settings, all sliders left, resolution turned down, shading uncheck, is 35 parked at SEA.  My VEGA and CPU are at ~ 10% usage on this.  What is interesting and frustrating, when almost all the sliders are right, my CPU is only at 25% usage and GPU is ~ 35% usage but FPS is ~ 25.  

Minimal background programs running.  does not matter if just after restart, using 11.20beta (I have used this then uninstalled this and re-installed it without beta), or if Kaspersky AV is running or not.  I have searched the internet and can not find ANYthing that makes a difference.


XP 11.10 (it does this with 11.20b as well)

on latest drivers for Vega. driver 18.3.4

Windows 10


Radeon RX Vega 64 driver 18.3.4

AMD 1700x

32 GB Ram @ 2400

1 GB ssD Samsung

1 Answer

0 votes
answered by (16 points)
To answer my own question.  

 Go to youtube and type in performance vega or 1080ti.  You will see one consistent think, both the 1080ti and the VEGA will be running at ~ 35% capacity with FPS 30-55 favoring the 1080ti.  I typed that correctly, the utilization of the GPU is only about 35% with CPU utilization about 20-30%.  This is a problem with XP11 coding since both brands are way under preforming.  check out this comparison of 1080 and vega 64.

 Notice the vega has a lower FPS but look at the utilization.  There is a ton of examples like this.  

A very long story short, I just completed testing xp 11.20 beta with my system and found some very interesting results.  If I turned everything down with the default Cessna or 747, resolution 1280x786, lowest visual effect, texture quality, world objection , reflections....everything, the FPS was 67 with GPU utilization of 60%, Vram 20%, CPU 21% (no cores even close to max), Ram 17%.   After running literally running 30 different scenario (I kept track of every combination in excel), the best combination of appearance to utilization was FPS 40, GPU utilization ~65%, Vram 48%, CPU 15%, Ram 24%, with setting of: Resolution 2560x1440 Visual effects high (hdr), texture maximum, Antialiase 4x SSAA, number of world object Low - medium, refection minimal, draw parked aircraft on, flight models per frame 2.  Of note, the problem I was having above is that I had the flight models per frame up to 10.  If though it was not even coming close to pushing my CPU utilization > 25%, it was killing my FPS without using my GPU.  I don't know why this is.  Where is the bottle neck?

When flying a payware, Mooney M20, the FPS dropped but with less utilization so the setting changed to:    Resolution 2560x1440 Visual effects Maximum, texture maximum, Antialiase FXAA, number of world object  medium, refection minimal, draw parked aircraft on, flight models per frame 3. with FPS of ~ 33.   This looks gorgeous!

In summary.  It is really frustrating to buy such hardware and see it mostly idle.  XP 11 is a poor use of resources for the Vega 64, 1080, 1080ti.  

I really hope the Laminar crew and code this better.
commented by (16 points)
To fix this X plane issue, go to and install Prepared. I have been using this for a good number of hours and works great.  When X plane works better, I may consider trying it again.  

Frankly, it does not matter which is better if it runs like a dog.  If you have AMD GPU, go with prepared V4 for now.