Got them from bestbuy, theres nothing printed on them, just your standard bestbuy insignia brand. All 3 CAT6s worked fine with my other pc, which is also hooked up to the same modem/router. 10mb upload.
All 3 Cat6s give me the same upload speed on my new one, which is 0.2. I''m thinking maybe my new pc isn't compatible with CAT6s? My motherboard is Gigabyte b450 aorus, which should work.