Windows 8 and 8.1 Forums


Dual Band Wireless-AC 3160 significantly slower

  1. #1


    Posts : 11
    8.1 64-bit

    Dual Band Wireless-AC 3160 significantly slower


    I just bought a refurbished Lenovo Y40 Laptop

    It is running on windows 8.1 and has a Dual Band Wireless-AC 3160

    The wifi speed is significantly slower than any other phone or laptop using the same connection. I used the Intel Driver Update Utility 2.0 software to download up to date drivers.

    I have tested this laptop on two different internet connections (two different houses). The wifi connection receives about 7-9 mb/sec download with 2-3 mb/sec upload.

    Using a ethernet cable, I receive about 30-50 mb/sec with 10/12 mb/sec upload.

    It is impossible to play any online games because my computer constantly experiences high ping spikes (400-1000ms) every 30 seconds or so.


    Is there any suggestions or software you guys know of that can help determine the problem? My 4 year old Asus laptop runs 3x better than this one.

      My System SpecsSystem Spec

  2. #2


    Posts : 96
    Win 8.1 Enterprise


    Hi there,

    What is your signed up bandwidth? Is the issue only happening to your own Wi-Fi network?
    Is this speed coming from your own network directly plugged in to the router or modem?
    Using a ethernet cable, I receive about 30-50 mb/sec with 10/12 mb/sec upload.
    If it is, you might want to fiddle with your router's wireless mode a/b/g.
      My System SpecsSystem Spec

  3. #3


    Posts : 11
    8.1 64-bit


    The 30-50 mbps is when I connect my ethernet directly to the router.

    I have tried connecting on two different internet connections (two different houses) with wireless as well as ethernet.

    Both times, using the ethernet is 3-4x faster than wifi. One of the houses is signed up for 15 mb/s. I am not sure of the second.

    I am only concerned/frustrated because every other laptop on either network is significantly faster and more stable than my Lenovo Y40. It is not up to par with any other laptop that tries to connect


    What settings would I look to configure? What is a/b/g?
      My System SpecsSystem Spec

  4. #4


    Posts : 96
    Win 8.1 Enterprise


    Can you log on to your router? Usually, you'll go to the Setup page, then Wireless Settings then you will then see the 802.11 mode/radio options then you may select your desired mode from the drop down box, usually it's set to Auto or Mixed mode, you may try the N or mixed of G/N. Here's an example of what you will need to fiddle. Mine is a Sonicwall, yours will be different but similar.
    Click image for larger version
    Changing the mode sometimes helps, please try a different options available for you and make sure that the other wireless devices won't be affected. If that happens, we'll try a different tactic.
      My System SpecsSystem Spec

  5. #5


    Posts : 11
    8.1 64-bit


    Thank you for your help.

    I actually bought a usb 150 mb/s edimax wireless adapter and have been trying to configure this. The wireless adapter is also slow when used on my computer (all the current drivers are properly installed). I just tested a Lenovo flex on the same network. It also has the dual band wireless-3160 and is having no problems at all.


    When using the wireless adapter on any other laptop, a perfect connection is established..

    My Lenovo Y40 wireless mb/s is 3x slower than every other laptop being tested.

    Any idea what could be going on? I am starting to think it is not my wireless card because the usb adapter is also significantly slower on my computer. Is there any hardware or software that could be the source of the problem?
      My System SpecsSystem Spec

  6. #6


    Posts : 96
    Win 8.1 Enterprise


    Sorry to hear about your new Wi Fi adapter. Have you scanned your computer for any possible spyware/virus infections?
      My System SpecsSystem Spec

  7. #7


    Posts : 11
    8.1 64-bit


    Hey there,

    I just scanned my computer using malware bytes. There were 0 results. I should not have any viruses because this computer is very new.

    Is there any other drivers besides my wireless card drivers that may be the issue? Is there any other way to trouble shoot this problem?

    I doubt the problem is my wireless card because the wifi adapter does not work well either.
      My System SpecsSystem Spec

  8. #8


    Posts : 96
    Win 8.1 Enterprise


    Thanks for giving it a try. A brand new computer can still get infected just to let you know... Thanks for running the scans anyway.

    I'd research more on the Wi-Fi adapter's driver, perhaps an older version might work.

    Do you have the latest Windows Updates, might want to check out the optional updates as well.

    Try booting up in Safe Mode with Networking by restarting your computer, continue tapping F8 then select this option, see if the speed is the same or not.

    Sorry for the late replies as I have been pre occupied.
      My System SpecsSystem Spec

  9. #9


    Posts : 11
    8.1 64-bit


    I tried updating all drivers / windows updates. On the site listed for the wifi adapter, I am unable to find older versions.

    Is it a possibility that Windows 8.1 has anything to do with this? I really do not want to send this back to Lenovo for repair because I use this laptop everyday for work and the process will take about 2-3 weeks.

    I am still confused on why the wifi adapter AND the ac-3160 both have weak connections...
      My System SpecsSystem Spec

  10. #10


    Posts : 96
    Win 8.1 Enterprise


    I don't know what else to suggest, I'm still thinking that it has something to do with the driver. Have you searched the manufacturer's site for the drivers? Perhaps, try another Wi-Fi adapter (although you've tried 2 already)?
      My System SpecsSystem Spec

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