Slow internet on a new desktop?

[Kuya Boogie]

Hello. I am having problems with my internet connection with my new ASUS M51AC-US016S. I have not yet downloaded any apps (except Webroot) or games and has only been checking my mail, Facebook, and Youtube. But every time I open them, it takes at least a minute to download the content. Does this has something to do with the new computer (like having a high processor, graphics, etc.?) or is there just something wrong with the internet connection? I tried restarting my wifi connection and has not helped. My laptop and other gadgets that depend on this wifi connection have been working perfectly well besides this ASUS M51AC-US016S.

Thank you.