22 hours ago, Gilson said:

Hello !

I just got to make my flying much better this weekend following the suggestions above. So, I would like to make this public to help somebody else get good results from Prepard3d 4.5.

My system is composed of a Main Board ASUS B450 processor Rayzen 2700X 16 cores and a video board NVIDIA GTX 1070, 16 GB main memory, four monitors connected, one of them with VC, and other with external plane view. The other two monitors run with auxiliary 2D screens. Resoluiton 4k on the main monitor.

I was even used to fly with 8~10 fps in very difficult way, having to turn everything off when departing and landing.

Then I read the considerations above and had a wonderful progress. Using affinity mask of 65535 and FIBER_FRAME_TIME_FRACTION=0.1, everything else made minor minor changes. I more than doubled FPS as a result and now can play freely with the other settings, putting the cursors to the right for all settings, having even Airbus 319x and 320X from FlightSim Labs running smooth with no shaking in approach and depart any more. I also limited FPS to 24 to free CPU power for use at around 90% on core 0. This caused the Video Board to present to work more effectively, now loaded with more than 70%. No problems with cooling, air in my case, with the boards raising to around 70 degree Celsius. I understand that for flight simulation you do not need more than 24 FPS. 

Before this changes, the boards seemed quite lazy, with 20~30 percent load.

Hope this helps somebody. I was tired of having inefficient advices from the Internet, and people saying "my system runs at 65 FPS steadily, I made this and this and this". I do not believe that !

Doubled your FPS?

 

Is this consistently with all the same settings and same ac over the same areas?

Based on your suggestions this would be an amazing find!

This isn't a new find at all. It's been observed for years that 

FIBER_FRAME_TIME_FRACTION=0.1 can boost fps considerably. However, any such tweak comes at a cost. In this case you can incur blurries as a penalty.

There's a magic flightsim triangle between

                                                low fps

                                               /            \                                   

                                      blurries    -     stuttering

which is hard to escape.

FFTF Dynamic by FSPS tries to ameliorate this by dynamically switching to a low FFTF value (like 0.1) on ground where you need any frame, and to a higher FFTF value in the air where you may run into blurries with this value.

An AVSIM search will provide plenty of contributions on the topic.

Kind regards, Michael

On 9/17/2019 at 12:44 PM, Kilo60 said:

Doubled your FPS?

 

Is this consistently with all the same settings and same ac over the same areas?

Based on your suggestions this would be an amazing find!

Not quite. But minimum in extreme conditions like Heathrow with 60% Ultimate Traffic Live by night, AES Airbus 320 Orbx Europe, FPS is not less than 18. And yesss, amazing !

On 9/17/2019 at 1:00 PM, pmb said:

This isn't a new find at all. It's been observed for years that 

FIBER_FRAME_TIME_FRACTION=0.1 can boost fps considerably. However, any such tweak comes at a cost. In this case you can incur blurries as a penalty.

There's a magic flightsim triangle between

                                                low fps

                                               /            \                                   

                                      blurries    -     stuttering

which is hard to escape.

FFTF Dynamic by FSPS tries to ameliorate this by dynamically switching to a low FFTF value (like 0.1) on ground where you need any frame, and to a higher FFTF value in the air where you may run into blurries with this value.

An AVSIM search will provide plenty of contributions on the topic.

Kind regards, Michael

I tried also FFTF 0.01, but I had lousy blurred scenery displayed. 0.05 also not good. Then went back to 0.1. My thought was that stuttering and low FPS were the same thing. It is a shame I had to spend a little bit more than expected in CPU, MB and Video Board to get to fly in a decent way, not looking most of the time to FPS counter. The simulator program should more democratic...

20 minutes ago, Gilson said:

This isn't a new find at all. It's been observed for years that 

Nice !

I did not intend to be new. I just wanted to help somebody, putting in a clear way what I found. 

17 minutes ago, Gilson said:

 My thought was that stuttering and low FPS were the same thing. 

Not necessarily. While very low fps (say below 20) certainly are accompanied by continuous stuttering you can also have good fps interrupted by regular or irregular stutters, notably while banking. And while I have decent fps most of the time (fps equal to monitor frequeny of 30 Hz), I see occasional loading stutters when entering a highly-detailed region (...LA basin) or airport.

Kind regards, Michael