Why is my Internet slow when I try to download torrents?

Rajdeep Chamaria April 22, 2012

I know this is not some very special problem but mines is a special case.

When I go to speedtest.net and other speed test sites, they show about 800kbps of download speed. But when i download a torrent file using utorrent it shows a download speed of hardly 100kbps. Is there some other program that is also using the internet which makes it slow?

  1. stern
    July 21, 2012 at 1:32 pm

    Yeah . When ever you download torrent's , Your torrent client automatically Uploads the data you are downloading .this is one of the reason makes your downloading speed slower .

    Note : You can decrease your uploading speed In your client .

    Go to >bandwidth allocation > set upload Limit >1KB/s

  2. Omstavan Samant
    April 23, 2012 at 4:06 am

    the speed test is based on how much data is downloaded by the browser in how much time and not by the total computer. A part of the total data is diverted to downloading torrents and another part to the browser. some background apps may also use the data packets like antivirus softwares for updating. Hence the speed test does not show the actual speed of data packets but the speed of the part being used by the browser.

  3. Bruce Epper
    April 23, 2012 at 3:07 am

    speedtest.net and others show results in kbps while uTorrent shows its upload and download speeds in kBps.  This is a bits versus bytes situation so seeing that your speed test shows 800kbps and uTorrent is downloading at 100kBps, those are equivalent (8 bits per byte).  This would indicate that your download stream is full.

  4. Oron Joffe
    April 22, 2012 at 10:30 pm

    Broadband speed tests work by downloading and uploading data between your computer and a server on the internet, and measuring how much data was transferred in a given amount of time. If your computer is currently busy downloading all those torrents, there's less bandwidth available for the test data. Since torrent software also participates in uploading torrents, the "upload" speeds will be affected too.

  5. Mike
    April 22, 2012 at 9:44 pm

    There are various reasons that cause a torrent download to be slow or even stall.

    - number of peers and the (upload) bandwidth they share
    - number of peers downloading (they more download the less bandwidth for each)

    Another important point are your settings and your networking hardware. 

    For example you should always set the upload speed above 6KB/s [for uTorrent] but a maximum of 80% of your upload bandwidth. If your entire upload bandwidth is used for seeding/sharing you won't be able to open connections to source peers.

    The following settings are also crucial!
    - Global maximum number of connections
    - Maximum number of connected peers per torrent

    If either one is set too high or too low speeds may go down. Also keep in mind that your router/modem has to handle all those open connections! If you allow uTorrent to create 4000 connection but your SOHO router/modem can't handle more than 1500 in total it will overload and cause torrents to be really slow or again stall.

    Personally I always set limits to 80% of both upload and download bandwidth. I have the global maximum connections at 1000-1500 which can usually be handled by any modem/router. The maximum peers per torrent are then set based on the simultaneous downloads. If you are going to download 5 torrents at the same time you can set it to 200-300. For 10 simultaneous torrents it obviously is between 100 and 150.

  6. ha14
    April 22, 2012 at 9:03 pm

    well torrents uses internet connection to download and depending how many torrents you download then other internet usage will suffer.
    Go into Option section and reduce the number of allowable torrents  - This depends on your internet connection is. For example, if your upload speed is 256kbit/s, then Max. Simultaneous Download should be about 3, and Max. Active Torrent about 4.

    How to Reduce the uTorrent Bandwidth

    you can use scheduling
    set µtorrent to download only at these times: Options > Preferences > Scheduler

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