Question wifi 5ghz is limited to 585 mbps when my pc wireless networking (wireless ac) is up to 867 mbps how can i get the full speed?

Oh okay was just making sure because my cousin has 900 mbps plan same pc and he gets that 800 some speed so i wanted to know if i can get it higher
The only guaranteed way is to get a wired connection.
The "867 mbps " number is and advertising gimmick. Is that possible in the LAB ? Yes, does anybody in the real wold get that number? No. It is the same as putting a 120MPH speedometer in a Yugo. Looks impressive, but not possible.
 
I got 1200 mbps internet plan from xfinity and my wifi speeds on pc are at 585 - 600 some but my pc can handle it up to 867 mbps so i was wondering how can i get it to full speed? I have the network adapters updated as well. I use an Realtek RTL8822CE 802.11ac PCIe Adapter

pc: https://www.bestbuy.com/site/hp-ome...b-hdd-256gb-ssd-black/6402514.p?skuId=6402514

Wifi is half-duplex, not full-duplex. The speeds you're getting are as good as wifi can get with a connection speed of 867mbps because there is a bit of back and forth that takes place.

The only way to get faster speeds is to have more radio channels. If you computer has a 2x2 radio, then you can upgrade to a 3x3 or 4x4 radio assuming your router is a half decent one with a 4x4 radio as well.

Also, upgrading to wifi 6E with 160mhz channel width will give you much higher speeds as well.