I just finished putting together my new computer (R9 5900x and RTX 3080).
On my old PC I had all 4 cores of my CPU pegged to 100% all the time, however with the new computer I am only seeing one CPU at near 100%. Even with that, it seems my CPU is not boosting properly. Ryzen master shows only a max freqency around 3900MHz while it boosts to 4900MHz in single core loads during stress tests, etc. Has anyone experienced this? Is there some tweak I may have applied on my old computer, but not on the new one?
MSFS will use all cores but one will be used for scheduling work to the other cores. That’s the core that gets maxed out at 100% and the others will sit below that.
Typically that single core will get boosted to the 4900mhz but the others will run at the lower speed.
Do check your motherboard bios settings to ensure boost is enabled appropriately.
Your monitoring software may not show a single core boost speed but the base clock speed.
That sounds normal, yes – the cores aren’t all fully loaded but several are in use and you will not get the single-core boost because there is no single active core.
I tried using the “auto OC” mode via Ryzen Master to boost my core speeds by 100 or 200 MHz on my 3700X but it didn’t make much difference, and I’ve turned it off to make sure it’s not causing extra crashes.
It seems a bit extreme though. Most of my cores are not only not loaded but actually in a sleep state. Several are clocked around 500MHz. Only two cores are actually clocked above baseline, but both are below 4GHz which seems strange considering MC boost is at about 4.5GHz normally and should be even higher with less cores in use.
Either way I’m waiting for the PBO2 BIOS update to drop before I read too much into this. I’m wondering if this is a hardware config issue or an MSFS issue… Or if it is just expected behavior
The 5900X is a BEAST of a CPU for productivity (rendering / video editing) workloads. The 12 cores / 24 threads it has will never be fully utilized by any game or sim (at least in the coming years, who knows what will happen in 5+ years).
If you bought this CPU specifically for MSFS, I’m sorry to say that you’ve massively overspent on a piece of hardware that will not be utilized. You would have gotten almost the exact same results with a 5600X. You could have figured this out by checking out the various benchmarks that have been available online since release day. Games and sims just can’t utilize those cores/threads like a tile based renderer, where it doesn’t matter that one task completes before the others.
If you’re also going to use your machine for productivity workloads, it’s a fine choice (one of the best there is currently actually).
It’s not a problem with the sim, it’s more equivalent to buying a Ferrari to drive a 5 mile round trip to the shops once a day at 30 mph.
So I have a 5900X and 3080 and with some tweaks to the in-game settings I get 45-60 FPS and no stutter. I guess I don’t care whether that’s with 1 core or 12
Seriously though, the big movers for me were
PBO on Ryzen Master
Game mode on Windows
No automatic capture on Windows
LOD at 100, some settings on Ultra, others on high (I read the post in guides section)
Don’t know how much this matters I have a 1.3TB cache on a separate M.2 SSD so I’m guessing most of what’s needed downloads
