Falls du W8.1 und WLAN nutzt, diese Lösung hat mir geholfen. Irgendwie scannt Windows auch weiterhin, obwohl man schon mit dem Internet verbunden ist, nach Netzwerken.
If you're on Windows 8 or 8.1, all you need to do is access the wireless network list by clicking on the wireless icon on the bottom right and it will automatically refresh. For those on Windows 7, click the wireless icon on the bottom right and click on the refresh button next to your connected network. As you are doing this, you'll notice that the ping counter on the command prompt will spike up. I thought it was an issue with the card as well and I was wondering about getting a replacement as well. It can be ridiculously annoying for gaming. It seems as though Windows likes to re scan for networks periodically causing random lag spikes. If there was a way to stop scanning while you're connected to a network, that would be great.
UPDATE: Oh boy, I was able to find a solution. It involves using the Registry Editor. Be careful not to change anything else except for the things that are listed.
Open Registry Editor (Windows 8/8.1, right click where Start button was, click Run, type regedit. Windows 7, click Start, click Run, type regedit)
Head to 'HKEYLOCALMACHINE \ System\ CurrentControlSet \ Control \ Class \ {4d36e972-e325-11ce-bfc1-08002be10318} [Be sure to expand the 4d36e.... folder]
Inside will be a number of folders named 0000, 0001, 0002, etc. Look through all these folders until you get one that says Intel(R) Dual Band Wireless-AC 7260 in the registry.
Once the device has been found, search for a value called ScanWhenAssociated.
If you see this value, set it to 0 on hexadecimal. If you don't see the value, click edit from the top, select new, and click DWORD (32-bit) value. Rename this value to ScanWhenAssociated (exactly as shown). Make sure this value is set to 0 on hexadecimal.
Restart the computer. This is important. The changes won't take effect unless you do.