Waves have
updated LV1 to show DIY Servers as "Unsupported" and you have to accept a warning message when adding one to the inventory. It will still technically work though. As of now this seems to be solely based on the CPU specs, which means as long as you have the correct CPU installed, your DIY server will show up just fine. I've had success with an i7-6700 system, which showed up as a Waves Extreme Server. Motherboard, Memory or Network Interface don't seem to play a role in this for now. From what I could gather through Archive.org this is the list of "officially" supported Desktop CPUs:
Haswell: i3-4150K*, i5-4590K*, i7-4790K
Skylake: i3 unknown**, i5 unknown**, i7-6700
Coffee Lake: i3-9100, i7-9700
Comet Lake: i3-10300, i7-10700, i9-10900k
*as far as I know there were no K skews of those CPUs, so it could be an error on Waves Website
**my guesses would be i3-6100 & i5-6500 but this needs to be tested