Last time I ran Aerofly FS 2 with stock clock of 9900K, and the FPS is 76. The graphics is all maxed out except for shadow which is set to medium. The location is Barcelona Airport of Orbx Netherland TrueEarth, the most heavy load DLC of FS 2.
Today I overclocked all cores of 9900K to 4.7ghz with all other settings the same as above, and the FPS is 88.9.
Also I ran X-plane. The location is London City Airport of Orbx TrueEarth UK South, the most heavy load DLC of X-plane. Middle high graphics setting. The FPS is 29.5.
Conclusion: Aerofly FS 2 is the most well optimized flight simulator today. With 9900K and 2080Ti, It can run at 90 FPS with the highest graphics setting in the most complicated scenery on Pimax 5K+. It’s obviously making good use of all the cores of the CPU.
X-plane is another story, yet at 30 fps it’s still playable. It’s mostly just using single core. Maybe I can make some arrangement of the core priority or turn off some cores so that it can run better?
I have to wonder why you’re only going to 4.7; the 9900K should be able to hit 5.0 Ghz easily and even upwards to 5.3 with good cooling … ? Also, what was the original clock that was giving you 76 fps?
Yes I have achieved 5.0ghz, but the gain in FPS is surprisingly small. Just 1 or 2 frames more than 4.7ghz. So I switched back to 4.7ghz and kept the core voltage as low as possible, which is 1.27v for now. I am very much a newbie in overclocking and I will explore more. Any advice will be welcome.
If you’re happy with your current system performance, my advice is to stick with lower, stable voltages. There’s no point in paying more for power & cooling (to include air conditioning) for unnoticeable increase in performance.