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My desktop computer is getting terrible download speeds, while other devices work just fine on the same network. Here are results from my devices, Mbps:

  • Nexus 4: 24.9 down / 26.8 up
  • MacBook: 31.3 down / 28.5 up
  • Desktop: 6.6 down / 28.2 up

All three devices connect to the same network (also tested in the same physical location), hitting the same remote server. Results stay fairly consistent between runs.

The desktop PC uses a TP Link TL-WN881ND PCI-e wifi card and runs Windows 8 (identifies as 'Qualcomm Atheros AR9287 Wireless Network Adapter'), default drivers, no additional wifi-related software installed.

My router is a TP Link TL-WR841N, default firmware. I have tried disabling WMM, changing router mode / channel width - none of those improved download speeds on the desktop.

Also, tried using my phone as a wifi hotspot and got the following results:

  • MacBook: 10.0 down / 1.6 up
  • Desktop: 9.0 down / 1.6 up

Much closer this time - problems with the specific wifi card / router combination?

Edit: I 'fixed' my issue by switching WiFi card to a TP Link TL-WDN4800. However, I still do not know what caused the original problem.

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If you hard wire the desktop, does the download speed change? – Dave Aug 21 '13 at 7:34
Unfortunately I can't run cables to the desktop. It does go up when connected to another wifi (phone in hotspot mode), but that goes through another provider. – Toms Mikoss Aug 21 '13 at 7:46
Are you able to test a 'dongle' or a different wifi card? – Dave Aug 21 '13 at 7:54
Yes, that seemed to fix the issue, whatever it was. – Toms Mikoss Aug 22 '13 at 10:27

I would suspect it's your card. Try a different card or a wireless dongle.

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