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E4200v1 and Wireless Speeds

Discussion in 'Tomato Firmware' started by ceckin, Mar 31, 2014.

  1. ceckin

    ceckin LI Guru Member

    Guys, i have a E4200 with Shibby v116 and its actually everything i want from a router. However i notice ridicilious Wi-Fi speeds. My setup


    1 Channel
    WPA / WPA2 Personal + AES

    Adv. Wireless:
    Afterburner: Off
    Frame burst: Disable
    Country: Singapore
    Power: 0
    Interface Mitigation: None
    WMM: Enable

    Noise floor:
    -92dBm (2.4Ghz)
    -87dBm (5Ghz)

    With this setup i get 65-72Mbps on 2.4Ghz and 115Mbps on 5Ghz (tested with iPhone 5). I also tried an Xbox 360 (without any other wireless clients connected at the same time) and i still get no more than 72Mbps rate on 2.4Ghz. This accounts to 34-40Mbps useful on 2.4 and 50-60Mbps useful on 5Ghz.

    My question is: Why do i get such a low performance out, considering the spectrum is far from congested and there's literally no one in the 5Ghz range.
  2. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    That's actually pretty good. Now that you have it up and running with sensible settings, you can try re-enabling frame burst and compare.

    Your throughput limits are not just from the router's radio, but from overhead, the client device's radio, physical obstacles, neighboring WLAN and non-WLAN interference, etc... I think there's some stuff about this in the Tomato FAQ. There are also many articles and research papers about theoretical max throughput using various technologies incorporated into 802.11n.
  3. ceckin

    ceckin LI Guru Member

    So there's no real problem, more like i hit the limit for one connection?
  4. Mihai Olimpiu-Cristian

    Mihai Olimpiu-Cristian Serious Server Member

    72 Mbps is maximum for n with 1 antenna with 20 mhz, for 2.4 Ghz, with one antenna using 40 mhz channels you will get only 150mbps. You need 2x2 and 40 mhz channels to get 300mbps... 3x3 450...

    Phones are limited in bandwith so that's not proper tool to test (72-115 I think are the usual speeds)... on my 2x2 laptop I can get 300 mbps on Ghz and 144 on 2.4 (20mhz channels)

    Your problem is the clients, not the router!
  5. ceckin

    ceckin LI Guru Member

    Yeah thought so. The 360 threw me off. I though it was a proper adapter (since you need all the bandwidth you can get), turns out Microsoft skimped on this one too.
  6. Marcel Tunks

    Marcel Tunks Networkin' Nut Member

    Gaming takes very little bandwidth, but is very sensitive to latency. Wired connections will always be better.

    As for the 5GHz spectrum, much of the interference people get is from non-WLAN devices such as microwave ovens, baby monitors, and cordless phones. There's an upper band and a lower band. If you get too much interference on one, then you can consider trying the other. 40MHz channel width is usually okay in 5GHz.
  7. ceckin

    ceckin LI Guru Member

    Thanks about the details, however i have zero interference on 5Ghz, guess 50-60Mbit/s is the limit for 1x1.

    With regards to 360, i was thinking more in terms of downloading the games/dlcs. I hate discs and i try to download games whenever, the problem is that 360's wireless adapter (although N-compatible) is 1x1 and as such it gets no more than 40Mbit/s which still requires a lot of time to get a 6-7GB game.
  8. cloneman

    cloneman Networkin' Nut Member

    E4200v1 112
    Using a Powerful device that supports 450mbps (macbook pro 2012), I am able to get 225mbps upload speed for LAN transfers on 5Ghz w/ 40Mhz.
  9. VirtualNobody

    VirtualNobody Reformed Router Member

    What method are you using for these tests?

    An excellent test of throughput is jperf/iperf with at least 4 streams.
  10. cloneman

    cloneman Networkin' Nut Member

    I was just uploading a file via SMB. THanks for the info.

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