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I am consistently getting speeds of 2mb or less on one of my machines. I can't figure out why. I have already tried:

  • Other Devices - All seem to work fine, speeds ranging from 7.6mb to 8.3mb
  • Wireless Receiver - It is a USB reciever and I have installed it and had it working fine on another machine, running the same driver and operating system (Os X 10.6.8)
  • Location - I have moved machine around to see if location makes a difference. Not a tangible one, all working machine maintain a decent speed. The broken one seems capped at 2mb still.
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Just to be sure, are those speeds in megabits or MebiBytes? What happens if you use a tool like IPerf between two machines? I want to know if the problem is slow local networking, or if it's specific to going to the Internet. – Spiff Dec 14 '11 at 2:20
It's whatever speedtest.net measure in. – Mild Fuzz Dec 14 '11 at 9:15
Haven't used iPerf, scares me a little. As I mentioned, though, I moved the wifi dongle from machines to no effect. The problem is with the machine, and not it wifi or my internet connection (or so it seems) – Mild Fuzz Dec 14 '11 at 9:17
On your wireless machine with the problem: iperf -s. On another machine, preferably wired into a LAN port of your Wi-Fi AP: iperf -c IPAddressOfWirelessMachine. Report that, and also report the make and model of your AP and client Wi-Fi adaptor, so we can see what they're supposed to be capable of. Also report what signal strength (RSSI) and connection rate (raw 802.11 signaling rate) your client Wi-Fi USB adaptor reports. – Spiff Dec 14 '11 at 10:00
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Have you tried the USB device in other ports on the machine? It's possible that your bottleneck isn't in the network but in the USB bus. – Justin Pearce Dec 15 '11 at 5:53
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