Slow speeds - Broadcom BCM4313

Discussion in 'Networking and Wireless' started by Samal, Nov 26, 2017.

  1. Samal

    Samal Newbie

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    experience slow download speeds (5 to 17mbps) w/old lenovo 20150 ideapad (i5-3230M chipset)
    wireless card: Broadcom BCM4313 802.11b/g LP-PHY
    router: asus rt-nt56u w/2.4 & 5GHz bandwithd
    2.4Ghz configured
    Mode: Auto with b/g protection enabled
    channel: 20/40 Mhz
    Control & Extension Channels: Auto
    WPA2 with AES
    Group Key Rotation: 3600

    on a wireless adapter I tried to change IBSS Mode from 802.11b only to 802.11b/g/n Auto to 54g - almost no change in download speeds. also changed Bandwidth Capability from 11b/g 20 Mhz to 11b/g 20/40Mhz

    Not sure what else can be done to increase speed.
    Tested wireless speed connection on ipad air 2 in the same room where the laptop is located. The download speed on ipad is about 4 to 5 times faster
     
  2. downloads

    downloads Super Moderator Super Moderator

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    What is the connection speed as reported by Windows?
    I don't mean the actual transfer speed but what Windows reports as theoretical connection speed.
     
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  3. Samal

    Samal Newbie

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    Windows's Signal Quality varies. Most of the time it shows 39 Mbps, but when I rechecked it now, it jumped from 19.5 to 52 and back 26 Mbps
     
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  4. downloads

    downloads Super Moderator Super Moderator

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    This seems to indicate that the connection is 802.11g not 802.11n even though the card is capable of the latter.
    With 802.11g connection you can't hope for more than 20mbps in ideal signal conditions, which would be roughly what you can get (up to 17mbps).

    Check the advanced driver settings again - ignore IBSS settings - these apply only to ad hoc connections.
    Disable any power-saving in driver advanced settings, make sure WMM is enabled (if such setting is available) and make sure your driver is up to date.
     
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  5. Vasudev

    Vasudev Notebook Nobel Laureate

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    @Samal You might check whitelisted Wifi cards compatible with Lenovo ideapad
     
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  6. Samal

    Samal Newbie

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    i rolled back adapter's driver ver to 6.30.223.143. Changed power settings as well. Rebooted. No effect. The day after 47mbps
     
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  7. Samal

    Samal Newbie

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    Thank you all!
     
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