WiFi speed down from 300Mbps to 54Mbps??

[tkrojam]

For my laptop, the speed was 300Mbps few days before but it changed to 54Mbps last night. I did not change any settings for my router and adapter and the only software I installed during this period is Windows update of March. I found the client monitor in router's setup page displays 802.11n is disabled. So what are the reasons?

Thanks in advance.

P.S. I've got the adapter driver to be the latest one.

 

[FuturDreamz]

set wireless channel to automatic?

 

[tkrojam]

set wireless channel to automatic?

hi, set now but no use, thanks.

 

[tkrojam]

Solved. Thanks.

 

[FuturDreamz]

For future reference: how did you solve it?

 

[tkrojam]

Just update the adapter driver to the one intel released few days before

 

[tkrojam]

The problem occurs again tonight, really don't know why...Please help, Thanks!

 

[James7679]

Question, what router are you connecting to? Is it a personal or public router? How many other users are connecting to it?

 

[tkrojam]

Personal, BuffaloWZR-HP-G300NH, 1 CAT5e, 1 Wi-Fi-G, 1 Wi-Fi-N

 

[James7679]

on the other computer that is connecting wireless, are you having the same issue? If you are, the router could be failing.

Do you have the same connectivity issues while connected to other wireless connections?

Are you sure that no one else is connected to your router? Maybe change the password to something very complex and see if the issue persists.

 

[tkrojam]

on the other computer that is connecting wireless, are you having the same issue? If you are, the router could be failing.

Do you have the same connectivity issues while connected to other wireless connections?

Are you sure that no one else is connected to your router? Maybe change the password to something very complex and see if the issue persists.

Sorry, I have to clarify there are 3 clients connected now:
1 Desktop: CAT5e, <-- Normal
1 Laptop: Wi-Fi-G (54Mbps), <-- Normal
1 Laptop: Wi-Fi-N (54Mbps) <-- Problem!

I have these 3 PCs only but no any other 300Mbps devices, Thanks.

 

[James7679]

Is this effected by distance?

What do you have 2.4 and 5.2 set at here?

 

[tkrojam]

This problem is present even the laptop is next to the router. Both 2.4 & 5 are set to "Auto" (Only 2 choices: "20 MHz" & "Auto")

 

[sbrads]

Run a program called InSSider and you'll be able to see what channels everyone round you is using and how strong they are. 300Mbps is much more likely than 150Mbps to be affected by overlapping usage of channels by nearby wifi users, so it may be worth changing to 150Mbps and setting your channels to avoid other users as shown by InSSider.

 

[tkrojam]

Thanks for everyone!!! Problem solved now by changing the setting of "Mixed-Mode Protection"