I would just use https://pcpartpicker.com/ to figure out compatibility if you haven’t ever built a PC before. Most users tend to use AMD because it is a little better supported, but honestly having an NIVIDIA GPU doesn’t stop you from doing anything.
Turkish DNS is really an interesting thing. Awhile back, the govt hijacked Google’s DNS service via bogus BGP routes so they could block/censor traffic. They then also started directing DNS queries away from the EU and pushing those to APAC.
Not sure what the sites are or what they resolve to on your end, but you might try using openssl to see if its a bad cipher or outdated cert maybe:
openssl s_client -connect domain.com:443 -ciphersuites TLS_AES_128_GCM_SHA256 -tls1_3