o melhor processador entre o ryzen 5 3600 e o i5 9400kf é o ryzen 5 3600 sem dúvidas e você disse que o ryzen está 1500, nesse link tem o ryzen por 1000 reais: https://m.pt.aliexpress.com/item/33059359910.html?spm=a2g0n.productlist.0.0.940e382clQFGrb&browser_id=099f80139a494076a30744a87af9c6a0&aff_trace_key=dc689a00026148798594c35754aab999-1607112971958-02072-UneMJZVf&aff_platform=msite&m_page_id=hm49gkztgamcabf2176c439b72f154e196251f9247&gclid=&_imgsrc_=ae01.alicdn.com%2Fkf%2FHTB10mOcXuL2gK0jSZFmq6A7iXXaK.jpg_640x640Q90.jpg_.webp se você pretender dar overclock tem o ryzen 5 3600x por 150 reais a mais nesse link: https://m.pt.aliexpress.com/item/4000983498042.html?_randl_currency=BRL&_randl_shipto=BR&src=google&albch=shopping&acnt=768-202-3196&isdl=y&aff_short_key=UneMJZVf&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&&albcp=11863430619&albag=120632188052&trgt=1073690845846&crea=pt4000983498042&netw=u&device=m&albpg=1073690845846&albpd=pt4000983498042&gclid=Cj0KCQiA0MD_BRCTARIsADXoopYtgtrQho_riEDLen-oPcfxbSmQTYmkYttgoljtoioHzlSHbq5qnR0aAi8sEALw_wcB&gclsrc=aw.ds placa-mãe aconselho pegar uma b450m pros ryzen 3600 e 3600x , espero ter ajudado