Disaster strikes. 5600x shows up, put it into my computer. Boot. Go into BIOS and make sure memory and everything is tuned up.
Everything is going fine, launch 3dmark to bench and bam, machine does a hard shutdown.
**** **** **** I've been building PCs for long enough to know a random hard shutdown isn't a "whoopsie" problem, something is bad.
HWmonitor comes up and I do a basic CPU-Z stress test and good lord the CPU temp and VRM temps are stratospheric, 95c for the CPU and 110c for the VRMs.
****.
Repasted everything and threw in another case fan. Temps are better, 85c under load (stock cooler in an HTPC case here folks), still having random shutdowns.
****.
Start typing b450m-HDV rev 4.0 into Google and the auto fill immediately completes with "and a 5600x". ****. That's never a good sign.
Lo and behold a good number of folks have run into this random crashing issue, and it looks like Zen 3 CPUs and XMP memory profiles absolutely torch the VRMs on this specific board.
I haven't tried yet, but the system should run fine if I turn XMP off, but then my 3000MT memory will drop all the way to 2100MT and that's gonna take a bite out of frames.
So I'm taking a breather here and recouping before I dive back in.
So, backwards compatibility on ancient low budget boards might *technically* be there, but there are a good number of ****'s to go along with it.