Grab something worthy of your cash is my only personal recommendation. Depending if you wish to use the rig or just crunch on it that's another question but I tried not to skimp on the Ryzen boards I've bought so far
My 3900X runs at 4.20GHz @ 1.00vcore. I've not messed about with the manual overclocking, all I have done with it is to set the XMP, test the volts (I'm on air cooling at the moment...
) and go from there.
With auto volts which was around 1.45vcore ish, power draw was around 280w or so, plus temps after just a minute were hitting into the 90C's.
I tested all the way down to 0.9vcore until I updated my bios and then 0.90vcore stopped working, but 1.00vcore seems to be the perfect spot for this CPU. Today max temps have been 56C, anywhere from 50C to 55C I think is the sweet spot and bearing in mind this is just an 14D sat on top of the CPU no securing or anything of it, I'm dead pleased (however it does need a clean...)
Folding/crunching/mining, they all have one thing in common for me and that's to never push the CPU, just let it go along gently and as constant as possible without trying to gain every last % of performance from it. From what I've been hearing some of these 3000 CPUs they have become degraded after long use now how true that is, I'm not sure, this is however the internet so... Probably not that true... Maybe?? Jayztwocents last video mentioned about it, but I haven't run the CPU anywhere near it's 'normal' volts for just this reason and more so to keep the temps and power consumption down. Which I didn't mention... Idle, gets as low as about 80w, underload, it doubles to just 160w to 170w depending on the type of work unit it's doing.. I thought that was pretty impressive??
Apologies for the ramblings but, I hoped my experiences with the CPU will be helpful, to someone at least