Problems with 5 Ghz

[Michael_Shakro]

Hello. I have a TP-link tl-wdn4200 dual band wifi card with the ralink rt3573 chipset. On ubuntu 14.04 the default drivers were the rt2800 which does not support dual band. I compiled the rt3573 drivers and installed the module and it seems to be running. The problem is that when It's connected to 5 ghz, it's incredibly slow. Most of the time websites refuse to load. I blacklisted the old drivers but I don't know what to do anymore. Any help would be greatly appreciated.

[praseodym]

Please show the outputs of:

lspci -nnk | grep -iA2 net
lsmod
iwconfig
ifconfig -a
cat /etc/resolv.conf
iwlist chan
sudo iwlist scan
route -n

[Michael_Shakro]

I was going through those and I decided to switch channels to see if it would change anything. It was set to channel 165 but when I set it to channel 40 it works fine. This is strange. It doesn't seem to work well with higher channels.

[praseodym]

Maybe a lot of networks around? Check "sudo iwlist scan"