Wifi speed is slow when the network is secured. But fast when open


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Hi everyone,

I have a router with access to the internet. I connect to that router via wifi. I'm having trouble with connection speeds in windows 10 only. My system is a dual boot and the other OS works as expected so this is a windows 10 driver issue and not a hardware problem.

When I open the router up completely (no identification and/or encryption) I get expected results on speedtest.net (200Mbps). This is the same as I get in my other OS with the router secured.
However when I secure the router as per the config bellow I observer anything between 20Mbps and 70Mbps.

I would appreciate any help in identifying where the issue is.

The current router configuration is :

Mode : 802.11 n/ac
Channel selection: Auto (44)
Channel Bandwidth: 20/40/80 (auto)
Wireless Network: WiFi 5 GHz: Active
Supported Protocols: N,AC
Security: WPA2-PSK (AES)

My driver is :
Broadcom 802.11ac Network Adapter (version 7.35.118.68)

Thanks
 
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Trouble

Noob Whisperer
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Hello and welcome to the forum.
Does your router support WPA2 - TKIP as well as AES you might try switching from one to the other as a test or in some cases you can select both TKIP and AES
 
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Those speeds...almost as if the router is running AC when open but defaulting to N when encryption is on.

Or...you actually have a older Celeron or an old Athlon in there which can't do the arithmetic quickly enough /jk
 
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Thanks for the replies guys.
The router has a WPAWPA2-PSK (TKIP/AES) option but I haven't managed to connect to it in TKIP via windows.
How would I go about testing that?
 
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Those speeds...almost as if the router is running AC when open but defaulting to N when encryption is on.
I set the router mode to 802.11 ac (in place of n/ac) to test this out and it's still as slow. ;(
 
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Just a thought. All OS's platforms are not created the same. I would contact Broadcom Technical and explain the issues you're experiencing, maybe the driver or router isn't compatible with Windows 10 OS.
 
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My advice: beg or borrow another router to replace yours and see if the results vary dramatically. SOHO routers should be considered consumables, the radio chips fail frequently compared to other computing devices, and the encryption faculty is often the first thing that craters. I have encountered many aging routers that worked fine in unencrypted mode yet completely screwed the pooch in any secure more.
 

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