Ethernet cable troubles

MrSuper · June 30, 2018

I have a long (15m) ethernet cable going from downstairs where my router is to upstairs where my PC is via the outside of the house. The connector on the PC end of that ethernet cable broke, so I replaced it myself, making sure the colors are the same as the router end (facing upwards, clip on opposite side and left to right it goes: WO, O, WB, B, WG, G, WBr, Br). Before I replaced the connector, the speeds I got were over 200mbps down and 12 up (which is what I pay for). Now, the connection seems to cut out multiple times per minute, and I only get 1mbps down and 12mbps up.

Here is the peculiar part:

The same ethernet cable plugged into my laptop gets me 70mbps down and 12 up.

A different ethernet cable plugged into my PC or laptop gets the good 200+ down and 12 up.

Currently using a WiFi dongle with my PC.

I don't know what has occurred to cause this. If the ethernet cable was broken, wouldn't the speed be the same on all PCs it's plugged into?

If the router was the source, the other ethernet cable would also produce the same, slow speed.

If it was my PCs fault, the other ethernet cable would also be slow, it is not.

Please help me out. I'm not a networking expert.

PS. (I wasn't the person who installed the outside ethernet cable in the first place).

Skiiwee29 · June 30, 2018

Honestly, sounds like a bad connector to me. If it was fine before and bad after.. there is only one new variable entered into the equation... Cut it and put another new end on it and see.

Dujith · June 30, 2018

40 minutes ago, MrSuper said:

WO, O, WB, B, WG, G, WBr, Br).

Thats your problem right there. It should be Orange/white, Orange, Green/White, Blue, Blue/White, Green, Brown/White, Brown.

The way its now you will get signal loss resulting in much lower speeds. And if the other end is correct it will prob even have to go down to 10/100 Mbit

MrSuper · June 30, 2018

25 minutes ago, Dujith said:

Thats your problem right there. It should be Orange/white, Orange, Green/White, Blue, Blue/White, Green, Brown/White, Brown.

The way its now you will get signal loss resulting in much lower speeds. And if the other end is correct it will prob even have to go down to 10/100 Mbit

50 minutes ago, Skiiwee29 said:

Honestly, sounds like a bad connector to me. If it was fine before and bad after.. there is only one new variable entered into the equation... Cut it and put another new end on it and see.

Thanks for your replies. I have now replaced connectors on both ends and in the cable order mentioned by @Dujith

Yet once again, the cable didn't work in my PC but did in my laptop. Then I tried the other ethernet cable once more and now that also started showing signs of damage. I have deduced from this that maybe my motherboard ethernet port has been damaged and cannot make proper connections - resulting in slow speeds and regular cutouts.

The reason why my laptop was not getting the full 200 down is that it's integrated network driver only supports up to 100 down.

I might have to RMA my motherboard or buy a PCIe network adapter.

I do not want a nasty looking network card in my build so would one of these work and deliver full speeds?
https://www.amazon.co.uk/Rankie-Network-Adapter-Gigabit-Black/dp/B010SEARPU/ref=sr_1_3?ie=UTF8&qid=1530361491&sr=8-3&keywords=usb+ethernet

Thanks for all your help.