RT-AC66U WiFi signal strength depending from FW version

Discussion in 'ASUS AC Routers & Adapters' started by djidji77, Feb 5, 2013.

  1. djidji77

    djidji77 New Around Here

    Joined:
    Feb 5, 2013
    Messages:
    2
    I just want to share results of some testing which I was conducting upon joining this forum.
    I came to RT-AC66U H/W ver. A1 after using TP-Link TL-WL1043ND and TL-WA901ND in my home network, for 5 years. It was like a coming on a light from a dungeon... I was thrilled and still I'm. I don't have any issue with it and when I saw that some members have different problems, I decided to do some testing.

    so, here is my setup:

    PC desktop connected wired to first LAN port of RT-AC66U, which WAN port is furthermore connected wired to Cisco EPC3212 cable modem. I have 40Mbs internet connection. On 2nd and 3rd LAN port I connect Synology DS1511+ NAS which NIC's are configured as Network Fault Tolerance only and finally on 4th LAN port I connected TrendNet TEW-692GR for extend range purposes. I use Sony Vaio laptop with Intel Centrino Ultimate-N 6300 WiFi card for signal measure. Both computers running Windows 8 Enterprise x64.
    RT-AC66U is placed vertically with vertically placed antennas too. Vaio is placed on 2m distance from router and inSSIDer 2.1.5.1293 is used for measurement.

    RT-AC66U setup as following:

    SSID same for both band. (Vaio setup: Prefer 5.2GHz, highest power, medium roaming aggressiveness)

    2,4GHz

    N Only
    40MHz b/w
    contr. ch. 1L
    WPA2-PSK AES
    Tx bursting enable
    WMM APSD enable
    125mW

    5GHz

    N Only
    80MHz b/w
    cont.ch. 36
    WPA2-PSK AES
    Tx bursting enable
    WMM APSD enable
    125mW

    with FW 3.0.0.4.266:

    2,4GHz signal, RSSI -15dBm
    5GHz signal, RSSI -19dBm
    laptop WiFi status: speed 300.0Mbps÷360Mbps fluctuated
    transfer 20GB file from NAS to laptop, getting 26-27MBs


    with FW 3.0.0.4.270

    2,4GHz signal, RSSI -17dBm
    5GHz signal, RSSI -34dBm
    laptop WiFi status: speed 450.0Mbps
    transfer 20GB file from NAS to laptop, getting 49-52MBs


    with FW 3.0.0.4.321

    2,4GHz signal, RSSi -17dBm
    5GHz signal, RSSI -35dBm÷-37dBm fluctuated
    laptop WiFi status: speed 450.0Mbps
    transfer 20GB file from NAS to laptop, getting 43-45MBs


    with FW 3.0.0.4.270.24 beta3

    2,4GHz signal, RSSi -17dBm
    5GHz signal, RSSI -31dBm÷-34dBm fluctuated
    laptop WiFi status: speed 450.0Mbps
    transfer 20GB file from NAS to laptop, getting 43-45MBs
    temperature 2,4GHz 58°C, 5GHz 64°C.
     
  2. Log in / Register to remove this ad

  3. mikeg

    mikeg Senior Member

    Joined:
    Sep 8, 2012
    Messages:
    326
    Location:
    Sweden
    Just a note the fw .321 has a newer Broadcom driver which the other fw:ers
    do not have. Good of you to take the time and effort to test The Tx power should not be set over 120 mW
    according to Asus because of distorsion issues.:)
     
  4. Sivim

    Sivim Occasional Visitor

    Joined:
    Jan 31, 2013
    Messages:
    21
    So this looks like 266 had the best RSSI on the 5 Ghz band but the worst file transfer rate?
     
  5. mikeg

    mikeg Senior Member

    Joined:
    Sep 8, 2012
    Messages:
    326
    Location:
    Sweden
    I have a TP-Link WDR4300 as a backup for the RT-AC66U with lower RSSI but better connection on 5 GHz band on my laptop than the Asus , 300 Mbps compared to 108 Mbps with the Asus. The TP.Link cost less than half of the A66U but is STABLE on the 5 GHz band so come on Asus give us something for the money we spent when we bought this top off the line AC-router..

     
  6. RMerlin

    RMerlin Part of the Furniture

    Joined:
    Apr 14, 2012
    Messages:
    14,090
    Location:
    Canada
    That device uses an Atheros device, so you aren't comparing identical technologies. You would have to compare it with an RT-N56U or an RT-N65U to compare similar technologies. Not to mention the fact that the RT-AC66U is a 802.11ac capable router - you can't compare pricing of the two.

    Some clients work better with Atheros-based devices, and others with Broadcom-based devices.
     
    Last edited: Feb 6, 2013
  7. djidji77

    djidji77 New Around Here

    Joined:
    Feb 5, 2013
    Messages:
    2
    yes, unfortunately :(

    I noticed something very strange - with FW 270, 321 and 270.24 there is a problem when changing output power in 5GHz band.
    for example changing from 100mW to 200mW, it'is change of 3dB and RSSI should be changed for same level but it change just for +1dB!? or changing from 200mW to 10mW, its -13dB change but RSSI change just for -7dB?! with FW 266 that's OK, ie RSSI is changed for same number of dB as I changed output power of the router.
    it looks like some sort of a bug or my unit going to be dead....
     
  8. Pierino

    Pierino Senior Member

    Joined:
    Jul 13, 2012
    Messages:
    485
    Location:
    Ohio
    If I'm not mistaken the rt-n56u and rt-n65u are Railink devices, so he souldn't really use those either. Right?
     
  9. mikeg

    mikeg Senior Member

    Joined:
    Sep 8, 2012
    Messages:
    326
    Location:
    Sweden
    You miss my point ; a top of the class router like the AC66U should be functional after the time frame from it was released till now. I am using Asus USB-N53 to connect with and the AC66U gives me lower connect speeds than the TP-Link. Just to further investigate the problem I am waiting for a N66U to test if I get the same problems with connection speed.



     
  10. RMerlin

    RMerlin Part of the Furniture

    Joined:
    Apr 14, 2012
    Messages:
    14,090
    Location:
    Canada
    Right (I had Realtek and Atheros mixed up), sorry.
     

Share This Page