Unsolved
9 Legend
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14.6K Posts
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197
July 5th, 2023 11:00
Inspiron 3847, slow Wi-Fi
Stock Wi-Fi has very slow download speed 1-2 Mbps. Stock wireless using Realtek driver installed by Windows 10 automatically.
Added Tplink usb wireless speed back to 20-30
How to diagnose or fix the stock Wi-Fi ?
Windows 10 clean install already done, no Dell driver
I have an older Inspiron 660 which had much better stock Wi-Fi speed also using Windows 10 driver.
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redxps630
9 Legend
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14.6K Posts
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September 3rd, 2023 17:39
solved. I replaced the card with one from another 3847. same DP/N. physically look good for both. after replacing it speed went up to closer to 20. this is the first time I have seen a wi-fi card deteriorate in function.
PS leads were connected tightly to the original card, I do not see any detachment of antenna on front panel. so i was not expecting a change when i replace the card. guess I am surprised. I thought it might be some software issue although the OS was clean installed recently.
(edited)
Chino de Oro
9 Legend
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8.1K Posts
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July 6th, 2023 17:00
For hardware, reseat the wifi card and check the antenna leads for proper connection.
For software, check the linkspeed and connection protocol. Network negotiated could default a wireless N to connect at 801.11b speed. Reset the network and perform troubleshooting as below. Try Dell driver to see any improvement.
Troubleshooting for network problem for Windows PC.
Dell wireless N 1705 driver,