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That problem also happens with 20 MHz channel width. In addition, while the adapter is stuck at those "Wireless-G legacy B mode speeds" the 5 GHz band also dies (you won't see any AP broadcasting at 5 GHz). So far, Intel doesn't have any drivers that fix this issue. Also, pinging the router is always erratic where you get ping spikes up to 2000 ms intermittently (with packet loss to boot) resulting to slow webpage load times.
Intel is basically slow to get a stable driver for their WiFi. Just need to wait for the 16.7.x.x drivers to come up for the 7260 series and see if it still does this behavior.
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I am sorry for the inconvenience; we are working on these issues.
We are looking for volunteers to help us testing and debugging drivers, in case you are interested please consider the points explained here: https://communities.intel.com/message/208369#208369
I'd like to add that I'm having the exactly the same issues as GarthJ described, down to connecting at a good rate for an indeterminate amount then an eventual slow-down to between 6-12Mbps which is virtually unusable. If I reset the network adaptor it will then go back up to a healthy 150-300Mbps for a while, before repeating. Sometimes I'll use Windows 7's "Diagnose" network tool which will often identify a different issue as being responsible and rarely giving a consistent reason for the reduction in speed (Problem is modem, DNS, access point?...), but "Diagnose" always ends in auto-restarting the network adaptor and is satisfied that it has fixed the issue. Until of course it slows down minutes or hours later. I'm not seeing any correlation between uptime or data downloaded during 'connection period' so I'm stumped. I have the Intel Dual Band Wireless-AC 7260 device which is attached to an mITX motherboard (Gigabyte GA-F2A88XN-WIFI).
Is there any resolution on this issue? I have the latest drivers, and really need this fixed, as I'm not forking out for a PCIE Wireless adaptor while I wait to use Intel's onboard solution (which is why I purchased the motherboard).
You'll have to wait for a fix. A temporary solution is to use a dual band N or AC router and connect at 5 GHz only. The drivers are rock stable and fast when connected at 5 GHz band. The issue occurs more likely on 2.4 GHz with a lot of access points and channel interference. While other WiFi adapters can experience interference and slow down, they are able to return to normal speeds when the interference vanishes while the 7260 can't on some occasions. That's why Intel needed more volunteers so they can make a much better drivers.
I just did a clean install of the new 17.0.2 drivers. It still did not solve the problem on my Thinkpad Yoga.
With HT mode enabled I would have terrible connection stability and low speed.
I would get 30-60 ping and a 15mbps download speed on speedtest.net with huge lag spikes during the test, and ultimately it would lose connectivity within an hour.
Once in a blue moon I would get a stable connection with high speed for less than an hour then lose connectivity and no resetting of the adapter would fix it.
With HT mode disabled, I get a steady connection with 3-4 ping and a 20mbps download speed on speedtest.net.
I purchased my Thinkpad Yoga a few months ago and have been dealing with this problem since.
I have tested every version of the drivers I could find for Windows 8.1, namely 16.10.0, 17.0.0, and 17.0.2.
I have also tested every possible configuration in the Advance setting with no success.
It appears that this is a common problem in the 7260 line as there are various posts with many replies on this issue.
This is a huge disappointment, as I am a big fan of Thinkpad and Intel.
I would greatly appreciate it if you can let us know if you guys are still working on this issue as it is still present with the 17.0.2 drivers.
If my assistance can be of any use please let me know.
Some good news. I think I found a temporary solution!
I went into Window's Power Options -> Edit Plan Settings -> Change advanced power settings -> Wireless Adapter Settings -> Power Saving Mode
On Battery: Maximum Performance
Plugged in: Maximum Performance
I forgot what it was before, but it was not "Maximum Performance" for both.
I am now able to get a steady 50-70 mbps connection with 2-3 ping on speedtest.net with HT mode on.
I can't believe I didn't think of going into Window's Power Options until a few hours ago.
So far, I have managed to maintain a steady connection for 5 hours. I pray that it stays this way.
I hope this will be helpful for others out there that are experiencing the same problem.
Intel Wireless-N 7260
Driver version: 22.214.171.124
We have released Intel® PROSet/Wireless Software 17.0.2. It now offers the option to enable/disable uAPSD in the adapter properties window for better compatibility with certain AP models, thus improving throughput.
Looks like I spoke too soon in my last post. After 24 hours my connection randomly dropped all the way back to 3 Mbps then it just wouldn't send/receive anything until I turned off HT mode. Looks like this is a problem that builds up over time and setting the power options to Maximum Performance only slow down the process.
Very disappointed... For your own sake Intel, fix this before someone starts a class action suit.
boy oh boy I'm not even sure where to start!. I bought an AC card (7260) thinking about the future and it looks like I'm returning back in time! (dial-up was so stable!)
This has to be the worst wi-fi card ever!, and I tested a lot!. THIS CARD IS NOT ABLE TO CONNECT TO A 2.4GHz 802.11n (40Mhz) - 300Mbps Network!.
I tried everything(EVERY SINGLE DRIVER RELEASED TILL NOW, EVERY POSSIBLE FIRMWARE FOR MY ROUTER, EVERY POSSIBLE AND IMPOSIBLE ADAPTER SETTINGS ), I almost threw away my router, sent the card 2 times in RMA, and for what?!
This card only "woks" on 20Mhz, and not even there isn't working properly! (connection randomly drops all the way back to 2~3Mbps, and then it disconnects!...and then the fun begins!!!!!!!!!. trying to reconnect, changing drivers, adapter settings, router settings...just to be able to browse the web!)
The conclusion is the same, whatever you do, you can't stop the connection to randomly drop! YOU CAN'T HAVE A STABLE CONNECTION WITH THIS CARD!
Very disappointed, If I knew I'd become an unpaid tester(guinea pig) I would not have bought this....thing!
Maybe I shoud mention that this is a DESKTOP CARD !(if it matters or not)
Going back to Atheros, at least their drivers are paying off!