E2000 low connection speeds

I recently "upgraded" my router from a WRT54G to the E2000, and changed my wireless computers to USB-N adapters. At first they were only at 54Mbps but found I had to use WPA2 (I was on WPA) and after making the change, I had anywhere from 107Mbps to 130Mbps connections. (Although these are dual-band adapters, I can't take advantage of 300Mbps because I left the router on 2.4Ghz only since I have some wireless-G only laptops and I understand you can't have the router on 5Ghz because they won't connect.)  Anyway, a few days later, when I checked the connect speeds of these wireless-n computers, one was at 5Mbps, another at 20-something.  Signal strength is good to the computers as it's always been.  Does this router "alter" the speeds "as needed" or something?  Any help is greatly appreciated!
Solved!
Go to Solution.

I just completed setting up my WRT54G with my E2000 and switched the E2000 to 5Ghz band. Now when my computers with dual band capability connects with the E2000 (using a couple of channels in the hundreds, like 129 and something or whatever) I see a connect speed varying anywhere from 140 to 300Mbps, whereas all my 2.4Ghz equipped computers are at 54Mbps.  My daughter's computer has wireless-n but only on 2.4Ghz and it originally connected as high as 130Mbps until I switched the E2000 to 5 Ghz so now she's stuck at 54Mbps.  I suppose if I had bought the E3000 (?) or another model that also supports both bands simultaneously then she'd have her wireless-n speeds as well as the others that could run on 5Ghz which affords more "open" channels compared to what's available on 2.4Ghz... (didn't want to spend that much money on a wireless-n router since I knew I could still use my WRT54G since selling it would get me almost nothing for it... might as well use it...

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    Go to Solution.

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       DSL Max enabled:   March 30, 2006
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    Noise Margin           14 db             24 db
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