Slow internet with cable on High Sierra

Hello everyone!

This is my first post in this subreddit and I hope you guys can help me.

I’ve made a High Sierra Hackintosh (cause Mojave and Catalina weren’t working too well for me) and the problems begins when I try to reach a website using Safari.

My PC is connected via Ethernet and the network settings corroborate it. Although I can join the website, the speed is extremely slow. For example, loading Apple’s website can take 5-10 minutes. I have 600 symmetric MB (600MB for upload and 600MB for download).

I’ve installed my Realtek model kexts and still not working. NVIDIA WebDrivers installed too.

Thank you for the help!