Se for trocar a placa-mãe é melhor pegar as opções que falei.
B450 aorus elite v2 gigabyte
B550 aorus m gigabyte
B450 steel legend ASRock
Fonte: cooler master, thermaltake, Corsair, msi são marcas boas
Thermaltake: https://www.terabyteshop.com.br/produto/5835/fonte-thermaltake-smart-series-PS-SPD-0600NPCWBZ-W-pfc-ativo-cabos-flat?gad_source=1&gclid=CjwKCAiA4smsBhAEEiwAO6DEjY5iPmPjZh9rlpAOxe0i_JxBRelMfC9ewsMRl3J0sAeTelpyF7hTERoCWfkQAvD_BwE
Corsair: https://www.kabum.com.br/produto/132783/fonte-corsair-cv650-650w-80-plus-bronze-cp-9020236-br?gad_source=1&gclid=CjwKCAiA4smsBhAEEiwAO6DEjfFPLPQNb8Q-KzzZjnFxOJgN_kPIh4yW8GyCHv3JKAFwrg_Noin7jxoCQQQQAvD_BwE
Cooler master:
https://www.pichau.com.br/fonte-cooler-master-mwe-650-bronze-v2-650w-80-plus-bronze-preto-mpe-6501-acaaw-bbr?gad_source=1&gclid=CjwKCAiA4smsBhAEEiwAO6DEjaPquyiUnQ4a8rEDfEQHR21YtvexZBr_IzzusRh4YCy5FheMXhbT2xoCkS8QAvD_BwE