Currently Being ModeratedJan 31, 2013 10:46 AM (in response to pookeemac)
Try connecting to your router with an Ethernet cable. Turn off Wi-Fi. Still slow? If not, see below under "Symptom: The Wi-Fi network seems slow":
Currently Being ModeratedJan 31, 2013 9:17 PM (in response to Linc Davis)
Thanks for the response Linc. As my router was in the adjacent room, I had to unplug the iMac and carry it over to try the ethernet cable connection. But before i did that, i decided to try the wifi speed again whilst physically next to the router. suddenly the speeds are back to normal again. strange. tried with ethernet and its fine too. so decided to move iMac back to study and monitor the situation for awhile. I'm unsure as to why this has happened. Since this is a new machine, I'm covered for a year should there be a hardware issue. Many thanks again for replying.
Currently Being ModeratedJan 31, 2013 9:45 PM (in response to pookeemac)
Add USB 3 devices to this list: