Which option suits your needs best: B550mh + R5 5600 or A320m-k + R5 5600?
Which option suits your needs best: B550mh + R5 5600 or A320m-k + R5 5600?
I've read some concerning information about thermal throttling on the B550 from Biostar. You should consider moving your R5 5600 to a different motherboard if you want better performance. The tests are available, and I'm sure there are more reviews in English or a translation of that page you shared.
Unless you need PBO/Curve Optimizer features, it's fine to proceed. Using CO for undervolting isn't an option for me.