I guess AMD motherboards aren't as future-proof as they used to be...
IIRC AMD doesn't officially support/ guarantee 3000 series on 370/350 either. It's up to motherboard vendor to support them via BIOS (and almost
all have, sometimes due to memory limitations they've had to drop support for 'rare' chips like Bristol Ridge as a balance). Lack of official support from AMD doesn't necessarily mean they won't work.
As an owner of an x370 board I'm not holding my breath for a 4000 series compatible BIOS though. Gigabyte has been pretty decent supporting up to 3000 series, but it'c clearly getting difficult supporting so many chips in old boards.
The funny thing is my RAM use 1.2Volts up until the 3000MT/s, wich use 1.5v but modern technology is so awsome that it don't make a big jump in power. That was somehow expected as the CPU do pretty much the same, I can overclock it to 4.2GHz and make it stick to that frequency all the time but idle power usage won't change. Power usage don't change with frequency, only load and voltage.
1.5V at 3000MHz? That's either awful RAM or way too much voltage being supplied. Should be 1.35V
I still own a Q6600 and the jump to a i5 after Sandy Bridge (i5 2400 and abobe) was way bigger than the jump from the i5 to the 6 core Ryzen.
That's the difference between buying at the tail end of Moore's Law and after Moore's Law broke down completely. You wouldn't have much of a jump from an equivalent Intel chip either.
The jump from Core original (core2/4) to Nehalem then to Sandy Bridge were back when Intel were doing actual generational shifts with +XX% IPC gains. They haven't had one of those on desktop for... 8 years now? and have actually had IPC regression (from Broadwell 5775C*, also some from security mitigations with variable results for how much), masked by frequency gains. And the 10nm chips that have had an IPC gain in the double digits are core and frequency limited to use in laptops.
*Bit of a special case since it was very much frequency limited, and it had a lot of EDRAM to compensate that 'artificially' boosted IPC. AMD also had IPC regression from Phenom to Bulldozer (or was it Steamroller? always forget what the first iteration was), for that matter, and for far less reason. Then again AMD also got a staggering 54% IPC gain from Zen(1), which was definitely generational.