Here's a half decent write-up of the differences between 2.4 and 5 http://compnetworking.about.com/od/wirelessfaqs/f/5ghz-gear.htm I think in your case the important point is that 5 is less good at penetrating solid objects than 2.4, like the floor between your iMac and router. dave On 2011-10-26, at 9:12 PM, Frank Birch wrote: > Thanks Terry. I'm still pondering why the 5 ghz runs slower than the 2.4 ghz. > The router is in my downstairs office and I ran the tests upstairs. Both on > the same iMac. > > I wonder if the pwr output is lower at 5 ghz. I have a lot of 2.4 ghz devices > running so one would think the 2.4 freq would have more interference hence > less speed due to retransmits. > > Still pondering... > > Regards > > On 2011-10-26, at 8:52 PM, Terry Genereaux <terrygenereaux@xxxxxxxxxx> wrote: > >> Hi Frank >> >> I am running both 5g & 2.4 on an Airport Extreme here is my speed test link >> results >> >> http://www.speedtest.net/result/1557490391.png >> >> Thank You >> >> Terry Genereaux >> terrygenereaux@xxxxxxxxxx >> >> Macbook Pro OS 10.7.2 ~ 2.4g ~ 500g HD ~ >> >> On 2011-10-26, at 8:43 PM, Frank Birch wrote: >> >>> Set up Airport Express on 5 MHz Wpa2, then ran speedtest.net test. Got >>> about 5 mbs download speed. Ran the test on the G 2.4 ghz freq and got over >>> 15 mbs. I got similar results on G using a Dlink 2.4 ghz router. >>> >>> No idea why the 5 ghz freq was much slower. >>> >>> I though the N 5 ghz was supposed to be faster. >>> >>> Any ideas? >>> >>> Regards >>> >>> Frank--- >>> Manage your account options at //www.freelists.org/list/muglo >> --- Manage your account options at //www.freelists.org/list/muglo