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3 posts

Wannabe Geek


Topic # 9979 28-Oct-2006 09:04
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Here's an ineresting take on broadband speed.

I have two identical laptops (toshiba satellite pro 4600's) a single broadband modem(D-link 502T) and a desktop computer. xtra explorer account (3500 kbps).

Using the modem to connect each of the computers to xtra I get different speeds for each of the computers using the nzdsl.co.nz speed test. To do this I simply had them all booted up sitting next to each other and for each test pulled out the cable connecting the modem and plugged it into the next computer and repeated the test. Thus I could do the the test within minutes of each other. Same xtra account, same modem, same phone line, different computer. The results kinda suprised me.

Desktop computer - 1540 kbps downstream 127 kbps upstream.

1st laptop - 1999 kbps downstream 76 kbps upstream

2nd laptop 3084 kbps downstream 131 kbps upstream 

These test are repeatable at all times of the day with one of the laptops clearly giving a better performance than the other computers.

Well, I know which computer I want to connect to the internet with!!! but the question is - "why is one laptop so much faster than all the others????"

All of these computers have been set up the same way, with the xtra cd they sent out with the modem, so why should they be so different.

Can anyone help me solve this? Theoretically the computers should deliver the same speeds so I suspect there may be some settings that are different between the computers.  So often we blame poor lines, house wiring, xtra etc, yet here we can see clearly that the computers we use also have a big influence on speed. Solve this question and it may help a few other people get better speeds. 
  

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Master Geek


  Reply # 50037 28-Oct-2006 09:31
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Goto device manager and post yor network adapters.

Are they all 1000 MPS ?

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Reply # 50038 28-Oct-2006 09:40
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Or perhaps in some of the adapters you have firewall associated with it? Or perhaps a newer computer with a different OS version? Windows Vista is faster than Windows XP Pro for example, due to the new TCP/IP stack.





 
 
 
 


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  Reply # 50041 28-Oct-2006 10:17
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What O/S are they running and have you run any TCP registry hacks or internet speedup programs on any of these PC's in the past? Some of these programs do nothing more than make your connection slower rather than faster!




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Wannabe Geek


  Reply # 50067 28-Oct-2006 15:33
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The fastest laptop is running:

Win 2000 pro
Network adapter - Intel Pro/100 VE network connection - driver date 08-01-2000

The second laptop (next fastest dsl) is running:

XP pro sp2
Network adapter - Intel Pro/100 VE network connection - driver date 01-07-2001


The desktop (slowest connection is running:

xp home sp2
Network adapter - Via Rhine II fast ethernet adapter - driver date 31-08-2006


Not sure if they are 1000 mps but I assume so - how can I check and can it be set or is it determined by hardware?


Thanks for all your replies



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Wannabe Geek


  Reply # 50068 28-Oct-2006 15:39
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btw no speed up programs or TCP registry hacks have been done on any of the computers.

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Master Geek
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  Reply # 50088 28-Oct-2006 18:17
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Watch if any of your machines use any bandwidth when your not doing anything, this can be done in task manager or with several different meters such as net limiter.

It might be that the slower PC's have something (anything from a worm to your OS) trying to use some BW.

Otherwise it must be some network setting oddity, if you can check see how fast you can move files from one PC to another by ethernet, if this is not far faster than it would take to DL the same program you have a problem.

The only other thing it could be is some internet related config issue. (mtu size etc...)

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