WiFi adapter says 450Mbps capable, but only seeing ~180Mbps

And another strange thing - do you see mentioning of Win10 in 7.77.119.0 inf-file?

 

https://www.catalog.update.microsoft.com/Search.aspx?q=7.77.119.0

Broadcom are only targetting ndis 6.3, so a win10 OS string isn't necessary.
This driver will work on 7-10 with no issues, probably even works on vista.

 

EDIT: Removed as it was completely OT.

 

OP asks about WiFi network card, not about router.

 

Somehow I thought he wanted to buy a new one. Must have misunderstood. ...

@OP:
To get 450mbps you would have to have large channels and be almost next to the router. More distance = worse signal = less speed / higher ping.
You should be on channel 1 or 5 or 9 or 13 and at least 2 channels away from any neighboring network (on 2.4 GHz band). If that is not possible at least change channel so you are far away from the strongest signals in your neighborhood (stronger than say ... -50). InSSIDer, NetStumbler or the like may help you.
And 450mbps is max, and like in wired networks you will get a bit less anyway, depending on quality of the wireless chip and other factors.

 

Finally got the PCEAC68 installed, I'm now getting max speed -



Happy days!