Since you've updated BIOS to a supporting one it should go OK...but nothing is guaranteed in this world. Maybe death. And taxes.
B350's were pretty weak overall as well as many X370's but your's (Asus Prime X370 -Pro )is a bit of an exception. It's CPU VRM is built of 6 true phases of NexFET 40A power blocks. And from what I can tell it appears to have the power blocks under a proper good heatsink so they should never have occasion to hit their rated 150C operating temp either. It should handle a 3900X well enough, probably even a 3950X. I wouldn't try fixed all-core, but that rarely pays off with Zen 2 or Zen 3 CPU's anyway
I've read some 300 series boards got Ryzen 5000 SMU's. Asrock was one...but I would not be surprised if Asus didn't. Asus is known for pushing the limits with AMD (they fully enabled PCIe gen 4 on 400 chipsets until AMD pulled it from AGESA).
As I understand these are unauthorized revisions and sort of a "at your own risk" type thing. Given the age of the motherboard probably not a big deal in itself, but certainly not something that I personally would risk in the cost of the higher end CPU. Reading indicates that the majority of this use and recommendation surrounds the R5 variant. I continue to keep up with reading on the subject, of which hasn't resulted in my confidence that risking a working system to try is worthwhile at this current time. IMO the cost of 3xxx isn't worth moving to for the performance as opposed to 2xxx and (as above) 5xxx is still a gamble.
There's a utility called "SMU Checker" you can find. Drop a board BIOS binary file on it and it looks for the SMU's included. Look for a Vermeer SMU...if it has one, high probability of success.
I destroyed a MB with some of my long video renders.
That's why I was leaning to the 3900 with its 65W instead of the 3900X at 105W. When I render recently my CPU peaked at 53C. A new 3900 with the same 65W probably would be a little warmer but far less than a 105W CPU like the 3900X.The 3900 can be purchased now at a few retailers at a premium. About $100 more than the faster 3900X!
In that scenario, I would then just upgrade the motherboard with a B550 one, and get a 3900x. You will spend a bit more, overall, but you get a better board, with faster connectivity.
Do not confuse 'temperature' with 'power consumption' or thermal output. TDP ratings (the 65w and 105w numbers I assume) are no indication of either of those ... power consumption isn't considered in the formula for calculating it. Ryzen's a remarkably energy efficient processor and both power consumption and thermal output is much smaller than most people realize.
Since you've updated BIOS to a supporting one it should go OK...but nothing is guaranteed in this world. Maybe death. And taxes.
There is one last BIOS update that ASUS offered that I have not installed (don't fix what isn't broke) but the update for 2nd & 3rd gen Ryzen's is installed. It may not be a bad idea to go ahead & install that last update.
I suggest updating to the latest BIOS. Reason has more to do with compatibility with upcoming Win11 but there could be more 'fixes' that improve memory compatibility and other things. Those memory QVL's are of more value when first buying RAM, but they're hardly exclusive. I would not have exchanged RAM until trying it with the new CPU and latest BIOS...unless there were also other benefits desired, like increasing capacity or higher speed RAM.
I will update.
While the motherboard mfr. QVL is a list of memory that's been tested with the motherboard (or so one assumes) it's the processor that has the most important part for ensuring compatibility, the integrated memory controller.
I hadn't checked for BIOS update for quite awhile. Per your suggestion I did. ASUS posted v5606 & it supports Windows 11 as default.
Just count on doing that. What all gets installed depends on the CPU and Ryzen 3000 is substantially different as it needs different drivers and settings for CPPC, in particular.
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