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WRT54G Throughput???

Discussion in 'Cisco/Linksys Wireless Routers' started by NavyMustang, Mar 11, 2007.

  1. NavyMustang

    NavyMustang LI Guru Member

    Ok, so this is probably a noob question, but I could really use some help here! I have searched high and low through this and many other forums, but can't find the answer. (Perhaps I'm just phrasing the question wrong because I'm sure that there's a common explanation!) I have a WRT54G v.3. Just in the past few days, my internet speed was increased from 5M/384k to 10M/1M.

    Running various speedtests BEFORE my speed increase on my BOTH my wired AND wireless devices would yield results of roughly 4700kbps down and 360kbps up. Now, after my increase, my speedtest results on my WIRED devices are 9400kbps/960kbps and my WIRELESS devices are maxed out at 5200kbps/960kbps.

    Thinking that there was something "wrong" with my v.3, I tried a WRT54G v.5 and got the same results. I then re-connected my v.3 and flashed it to DD-WRT. I have "tinkered" with a ton of different settings, channels, etc. AND have killed any external sources of interference that I could (i.e. unplugged my cordless phones, etc.). I STILL max out at just a hair over 5Mbps over my wireless connections.

    Is this a common problem? Can anyone please tell me what needs to be done to get the full benefits of my 10Mbps on my 802.11g devices???


  2. Mastec

    Mastec Network Guru Member

    You don't have a problem and nothing wrong with the routers.... Wireless speed is normally half the speed of wired.
  3. NavyMustang

    NavyMustang LI Guru Member

    I've heard something of this before, but I'm still a bit confused... I have heard that your wireless throughput is about half of what your rated speed is. For example, if you have a 54M 802.11G wireless network, then your throughput would max out at 27M. That should be good enough to see 10M speeds on a wireless network.

    Is there any type of a wireless network (i.e. Pre-N) that I could set up that would give me the full benefits of my internet bandwidth?
  4. HennieM

    HennieM Network Guru Member

    I found dd-wrt to be a bit slower on wireless side than other firmware - don't know why. Maybe try some other firmware?
  5. Mastec

    Mastec Network Guru Member

    I have dd-wrt v23 sp2 standard and get nearly 15MB wireless and 20MB wired. As for the 54MB 802.11G, that means it supports bandwidth up to 54 Mbps.
  6. ifican

    ifican Network Guru Member

    Is that throughput across the backplane of just on your lan? And yes wireless adds overhead to the point of right around 30% if you take whatever your getting on your wired machine to a speedtest site and run wirelessly to the same sight you should be right about 30% less. Now dont hold that number to the fire, because i have seen variances of up to close to 50% but most are right around 30.

    Just ran a quick check and though i have never run dd-wrt HennieM may be onto something, your numbers are showing about 45%, i did a test here on hyperwrt+thibor and mine is right at 30%. I have never been anal enough to really care about the speed difference but i am curious if anyone has ever test different security vs adapters speeds (b,g) to see if there was a significant difference. We dont need to concern ourselves with lan speeds which is by far faster on G I am curious though about wan speeds as most users dont have the wan connection necessary to max out a wireless b adapter.
  7. Mastec

    Mastec Network Guru Member

    Those speeds are bandwidth tests done at www.dslreports.com. My LAN speeds are faster of course. I can transfer music and video files between my machine, my wifes laptop and kids desktop in the blink of an eye.
  8. meee

    meee LI Guru Member

    your problem solved

    Assuming your operating system is Win XP, if these registry parameters do not exist create them. (right click, create new key/ then enter the 131400 value as a decimal)


    131400 (decimal)

    131400 (decimal)

    I doubled the value to 262800 for my 10 meg internet, but the 131400 should work. So sad that many cannot access what they pay for because "experts" reply that 1/2 connect speed is normal with wireless. Wireless is capable of anything up to the router limitation(54meg, ect..).
  9. NavyMustang

    NavyMustang LI Guru Member

    You are absolutely correct meee. I actually did figure this out a few days ago after running the "tweak test" on dslreports.com. Following a two minute, long-distance ping test and using the formula that they recommend at their site, I factored my optimum RWIN to be 206500. Once I changed that on all of my wireless systems, I was getting speedtest results of 9950Kbps/970Kbps.

    Thanks again. Hopefully this post will help someone else like me in the future!
  10. meee

    meee LI Guru Member

    No problem man, I'll keep an eye here and perhaps help to turn this forum into something even more usefull.....enjoy, glad to see things working as they should!
  11. meee

    meee LI Guru Member

    Another Suggestion......

    If speed test are inconsistant, increase distance between the router and modem to minimize interference. This type of interference becomes more obvious with the increase from 5 to 10 meg..
  12. Meetloaf

    Meetloaf LI Guru Member

    Meee, you are a spectre from the gods...why on earth isn't this information more well known? I created the keys, rebooted and my test on speakeasy.net went from 2800 to 8200...BEAUTIFUL.

    Thanks a million
  13. meee

    meee LI Guru Member

    another fix

    Electromagnetic interference increases between the router and modem with 10 meg internet (as opposed to 5 meg). Such a simple fix, but increasing the distance between the router and modem will fix download speed problems if you have them close together.
  14. meee

    meee LI Guru Member

    another suggestion to increaSE SPEED

    Electromagnetic interference increases with the 10 meg (from 5 meg) internet upgrade, increase the distance between the modem and the router.
  15. Meetloaf

    Meetloaf LI Guru Member

    Hey mee, I am curious, when you talk about increasing the distance between the modem and router, are you talking about physical distance (unit to unit) or the length of the cable? And what is optimal if you have upwards of a 10 meg connection?

    Thanks again
  16. meee

    meee LI Guru Member

    sorry about duplicates

    Posting wasn't working, now all appeared....sorry about the post shown in duplicate, forgot to mention this to Navy Mustang in first post and was trying to continue help with his connect speed.
  17. meee

    meee LI Guru Member

    Meatloaf_clarification on modem and router separation

    I am refering to the distance between the units, no need to increase cable length unless "very" short. Too long a cable can also cause minor issues.
  18. meee

    meee LI Guru Member

    Meatloaf_10 meg

    I have charter 10 meg, closest test on speakeasy averages 10,750. The electromagetic interference caused by the router and modem being close together will make the connection inconsistant, so the separation should first improve this. You may also see an increase from your 8200 connection. Hope it works for you, such a simple fix.

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