Couple things. . .
- I'm most definitely not an electrician, but doesn't anything with an a/c to d/c adapter have a smaller chance of being affected by line level minor gremlins? Yes I know they can and do fail, but when your next router dies I might take a multimeter to the a/c adapter's output before you go tracing down circuit gremlins.
- For the newer broadcom based Asus routers (I also have the rt-N66) there is a firmware out there that, with Asus's factory guidance, takes the stock firmware and makes some mild improvements on it. It is the only non-OEM firmware I've ever read a review on SmallNetBuilder
and heard him endorse it. It's called Merlin WRT
and it's great. . .smooth sailing.
- Instead of doing channel "auto" try doing a site survey (if you have a mac, this feature is built in) to find nearby APs, their signal strength, and channels. Yes, that's kind of what "auto" does, but you might have one set of results on one side of your house, and a completely different set near the router. On 2.4ghz band channels 1, 6, and 11 are considered the best because they can do 40mhz wide channels without overlapping each other. Also try setting the channel bandwidth manually to 40mhz.
- Test your actual wifi RSSI (signal strength) in various places before/after any changes you do, in multiple places around the house. With a mac you hold down option and click on the wifi menubar icon, I believe the system tray network icon in Windows might reveal similar info somehow (sorry, forget off the top of my head). Also try running a speed test (speakeasy, dslreports, etc) a couple times in various places, but always to the same server. This way you can determine both your intranet signal strength and your internet bandwidth.
- Make sure your router is on a hard surface, even try putting extra rubber feet on the bottom to elevate it a little for more airflow, and make sure it has 1-2' of free space in at least 4-5 different directions. I also have run a $15 Vornado Zippi
fan on all my routers for the last few years, it's silent (in slow speed) and, why not. . .never had one fail.
FWIW - I'm on my mid 2009 Macbook (2-stream N), approximately one floor and 20-25' away from my router right now, on 5ghz channel with an RSSI of -61 and a wireless speed of 216.
Here is a speedtest.net results from my MacBook
, here is one from my iphone
And copying a 1gb file from my Synology 212+ NAS via wifi to my MacBook at 20MB/s+, which is pretty solid. . .