Firstly, the issue you had at the end of the flight is very likely due to something occurring with the sim / addons / server side issues / and your general settings (such as traffic etc.).
It is not hardware related, so no amount of overclocking is going to fix that.

Secondly.  I have an Alder Lake processor also, (12900k), and my view is that is eats MSFS for breakfast (4k ultra settings), with utilisation not going much above 40% on a single core / thread, and the other cores / threads just cruising along - so overclocking is not necessary.

Also, even trying a slight overclock on these chips starts to generate a lot of heat and thermal throttling, so it isn't really worth it.  You just don't need to do it with Alder Lake. 
You can try messing with lowering voltage if you really want to try overclocking and reducing the heat issue, but there is a lot of trial and error involved, and you can induce stability problems.

If you run at higher resolutions and settings, the GPU will now be the main limiting factor, along with a few issues with the sim itself, which you have experienced.
Hopefully, Asobo's continuing tweaks and bug fixes over the coming months will alleviate some of the remaining issues, including the one you are dealing with - reading the forums, including the official site, your issue is not uncommon.

Edited February 20, 20224 yr by bobcat999

Overclock my 1080 ti and my  i7-5930K CPU and it now runs smoothly at high settings at 4k. Before this I got a bit of judder looking out the side window at the airport while moving. 

Edited February 20, 20224 yr by warbirds

I undervolt my 3080 lol. 99% of the performance with much lower temps/fan noise and power consumption. Plus overclocking leads to CTD in MSFS and XP11. 

I'm always against OC, but it is just me...

Starts with the fact that I don't want tpo spend money on those ultra "cool" coolers,  some water-based... Nah ! No way...

And, MFS runs so snooth in my Ryzen 5600 x - no need at all for OC I guess...

I just removed my overclock trying to chase down the source of some CTDs so I’ll be seeing if it made much difference today.

I have had my i5 9600K at 5Ghz from the day I rebuilt my PC and have had zero issues with either MSFS or X-Plane 11. I did some thorough stress testing and have good case cooling plus I switched from my old water cooled CPU cooler to the Noctua NH-D15. This thing is a beast and my CPU temps generally sit around 60 degrees. I have several Noctua case fans as well, they are not the most fancy looking but man do they ever work well.

I tried in the past to overclock my 1080TI but to be honest it was more trouble than it was worth so I leave it with default settings. I did however get rid of the crappy stock cooler and did the dual. Noctua fan mod and replaced the stock thermal paste. I guess I could try removing the overclock but in my case I’ve never had any issues with stability. I run MSFS @4K and I am so pleased with the way the sim looks and performs. I do see some hardware upgrades in the future but not until the pricing madness subsides.

I guess the moral of the story is if you are going to overclock your system do some thorough testing to make sure it is stable.

7 hours ago, cianpars said:

Certainly, I find this to be the case for AMD CPUs and Nvidia GPUs

Not an overclock, but one thing on the 5 series AMD rigs to try is the undervolt Curve Optimizer within AMD Precision Boost Overdrive - lowers temps and higher boost on all cores (as the AGESA logic sees more headroom to work with).  

Ryzen 5000 Undervolting with PBO2 – Absolutely Worth Doing - YouTube

Edited February 20, 20224 yr by DylanM

There was a point where we could not run our graphics card OC'd  - SU5 I think. But otherwise I run my machine OC'd throughout. I find it definitely give me a boost in performance.

i7 11700k @ simple OC to 5GHz via AIsuite3

GTX1080Ti FTW3 factory OC to 1.94MHz

32Gb RAM at 3MHz

Had occasional CTD's in the beta, I do have a fair amount of Community addons (CJ4 mod, G3000mod, Aerosoft simple traffic, Bijan Seasons, some 3rd party planes, Orbx airports, all my Marketplace airports, sometimes use other satellite imageries,  so that's to be expected - but pretty stable otherwise.

Always use maximum overclock of my 9900K, all cores, but at a CPU-sustaining core voltage.  I don't have CTD, no stutters or any other issues.  With the 3080Ti on board the clear limiting factor is my CPU so would never want to not overclock it.  Not too long ago I had booted to a non-overclocked state I forget why now, forgot I had and ran MSFS and wondered why performance had deteriorated, then recollected.

As for poor performance towards the end of long flights:  

https://www.avsim.com/forums/topic/615193-lost-frames-on-long-trips/?do=findComment&comment=4726121

 

 

I need to check if it's still so,  but zooming the Garmin map range in too much caused severe lag for many of the people I fly with.

My current sim rig is GPU bound if I run at 4K,  so overclocking the cpu is presently of marginal benefit to me.  It still does help a bit as Rob mentions above regarding hitting vsync/framelock matches.

If I turn down to 1440 then we're talking more useful benefit to overclocking my cpu.

Anyway I've oc'ed since day 1 with MSFS and I think I've only had 2 CTD's in that time.  I was not able to determine if these CTD's anything to do with my overclock.  In my opinion the admonition by MS/Asobo re: overclocking is done because many overclockers simply do not cool or power their cpu's adequately.   My philosophy has always been that the last 5% of an overclock really probably is not worth it, unless you're going for records.

I did some simming with my CPU overclock off and I honestly can't say I noticed a difference.  I left my RAM in XMP1 mode. 

In addition, I managed to do four flights today without a CTD so I'm concluding that the overclock was the culprit.  Weird how it could be stable for so long then suddenly start causing problems.   

1 hour ago, regis9 said:

Weird how it could be stable for so long then suddenly start causing problems.   

My understanding has always been this happens w/ overvolting and perhaps w/ higher temps, over time, very slow degradation.  I noticed I had to bump up core voltage a tiny bit to retain stability after almost 2 years of operation, and dialed back from 5.0 to 4.9Ghz, and lots of hours of operation per week.

11 hours ago, wiler said:

I undervolt my 3080 lol. 99% of the performance with much lower temps/fan noise and power consumption. Plus overclocking leads to CTD in MSFS and XP11. 

What are you using to undervolt? Afterburner? Weirdly I found that my system was unstable even when I undervolted using afterburner, so I just leave it stock now and limit fps.

 

22 hours ago, fppilot said:

A good deal depends on what you fly, where you fly enroute, where you fly into, and what addons you have in use for that flight, payware and freeware.  It all contributes.

This is even in the bush... it gets lower at major airports, resource usage doesn't go up beyond around 50-55%...