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Choosing the Right RJ45 Cable for Optimal Internet Speed: A Purchase Guide

fenri95 29289 16
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What RJ45 Ethernet cable should I buy for a 15 m run to get full internet speed, and does the cheap 20 m Cat5e offer support for that speed?

A 15–20 m Ethernet cable will not reduce speed by itself; if both the computer and router have 1 Gbit ports, a Cat5e cable should already handle 1 Gbps, and Cat6 is also fine [#15932857][#15933186][#15932800] If your equipment only negotiates 100 Mb, then even Cat5 is enough, but to know the real limit you need the wired network card and router port speed, not the Wi‑Fi card [#15932800][#15933109][#15933158] For a longer-lasting purchase, choose a ready-made cable with factory-crimped RJ45 plugs, because those connectors are more durable than hand-crimped ones [#15933186][#15933201] The cheap 20 m Cat5e offer can be acceptable if it is a real Cat5e cable with factory-terminated connectors [#15932857][#15933201]
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  • #1 15932764
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    Hello, the wifi card gets about 50mb / s, after connecting the cable, it goes almost 100mb / s. I need to buy about 15m of RJ45 cable I have to look at something when buying such a cable, will I get this speed?
    I found auctions where a 20m cable costs PLN 8 with delivery .. can it be?
    http://allegro.pl/ko28-kabel-sieciowy-lan-ethernet-rj45-cat5e-20m-i6308979193.html
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  • #2 15932800
    sanfran
    Network and Internet specialist  
    Posts: 9794
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    If you have a 1G port on your computer and router, look for the cable marked CAT6. If you have 100 MB then CAT 5 will do.
  • #3 15932815
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    How to check this on the router are there any markings?
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  • #4 15932857
    bogiebog
    Level 43  
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    20m cat5e cable should pull 1gbs.
  • #5 15932908
    jimasek
    VIP Meritorious for electroda.pl  
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    bogiebog wrote:
    20m cat5e cable should pull 1gbs.

    I confirm,
  • #6 15932945
    sanfran
    Network and Internet specialist  
    Posts: 9794
    Help: 953
    Rate: 2951
    fenri95 wrote:
    How to check this on the router are there any markings?


    Connect your computer to the router and see how fast your connection is negotiated.

    Choosing the Right RJ45 Cable for Optimal Internet Speed: A Purchase Guide
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  • #7 15932974
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    Ok, I will check how I connect with a cable. At the moment, through the TP-LINK TL-WN881ND network card, it seems to be able to drag up to 300mb. The router is right behind the wall and the speeds are different, sometimes it is 60mb / s and sometimes it will show 96mb / s, what does it depend on? I have all drivers, the range is full. And the fiber suppliers are fine, the cable has a constant speed of 98 all the time, sometimes 100mb / s.
  • #8 15933109
    m.jastrzebski
    Network and Internet specialist  
    Posts: 5238
    Help: 679
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    sanfran wrote:
    fenri95 wrote:
    How to check this on the router are there any markings?


    Connect your computer to the router and see how fast your connection is negotiated.

    Choosing the Right RJ45 Cable for Optimal Internet Speed: A Purchase Guide

    Sorry, but a stupid idea. The author writes that the cable runs exactly 100mbit, it is rather with such a speed that he has a connection.
    To determine the maximum speed you need to know what your network card and router can do. In short, let the author specify the type of network card in the computer, or laptop model, etc., and the name of the router.
  • #9 15933146
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    The Huawei EchoLife HG8245H router and the network card in the TP-LINK TL-WN881ND stationary computer.
  • #10 15933158
    m.jastrzebski
    Network and Internet specialist  
    Posts: 5238
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    fenri95 wrote:
    The Huawei EchoLife HG8245H router and the network card in the TP-LINK TL-WN881ND stationary computer.

    You entered your wireless card. You can't stick a cable to it. If you want to know if you can count on a 1gbit connection, enter the type of the wired card, and if it is built-in on the main board, the board type.
    The router has 1Gbit ports.
  • #11 15933174
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    Yes, buddy, I gave a wireless card on which these speeds are different, now, for example, it is 60mb / s and I connect the cable to the board socket and there is almost 100mb / s, the motherboard is Asus M5A78L / Usb3
  • #12 15933186
    m.jastrzebski
    Network and Internet specialist  
    Posts: 5238
    Help: 679
    Rate: 862
    fenri95 wrote:
    Yes, buddy, I gave a wireless card on which these speeds are different, now, for example, it is 60mb / s and I connect the cable to the board socket and there is almost 100mb / s, the motherboard is Asus M5A78L / Usb3

    Both the motherboard and the router have 1gbit ports. You can have such a cable connection between these 2 devices. How fast your internet is, you did not write it.
    Each cable of this category mentioned above should work up to 100m distance with full speed because this distance is provided for by the Ethernet standard. It's not WiFi, that if the cable is 50m, the speed will drop. Buy a cable that has factory-sealed plugs, they are more durable than those where someone in the store squeezed the plugs.
    After WiFi, nothing is ever guaranteed because you use one and the same radio "cable" together with the sasaid.
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  • #13 15933195
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    OK, that is, just buy a cable marked CAT6, I will buy it ready with Allegro up to PLN 10 full of it ..
  • #14 15933201
    m.jastrzebski
    Network and Internet specialist  
    Posts: 5238
    Help: 679
    Rate: 862
    fenri95 wrote:
    OK, that is, just buy a cable marked CAT6, I will buy it ready with Allegro up to PLN 10 full of it ..

    Accurately. For the durability of the cable, make sure at the auction that the RJ45 connectors are factory-wired. They are then flooded with plastic and are simply more durable. Because you can make such a cable by crimping the plugs on it. 2PLN you will pay more for such a cable.
  • #16 15933534
    sanfran
    Network and Internet specialist  
    Posts: 9794
    Help: 953
    Rate: 2951
    They can be.
  • #17 15933569
    fenri95
    Level 16  
    Posts: 470
    Rate: 74
    ok topic to close
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Topic summary

✨ The discussion revolves around selecting the appropriate RJ45 cable to achieve optimal internet speeds. Users recommend CAT6 cables for connections up to 1 Gbps, while CAT5e cables are sufficient for 100 Mbps connections. The importance of checking the specifications of both the router and network card is emphasized, with suggestions to ensure that the RJ45 connectors are factory-sealed for durability. The user inquires about purchasing a 15m cable and confirms that their current setup achieves nearly 100 Mbps with a wired connection. The conversation concludes with the user deciding to purchase a CAT6 cable from an online auction.
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