Category 5e UTP Ethernet Cable Speed Drop: Reducing Length & Hand-Mounted RJ45 Plug Impact?

Good day.

I recently purchased a 10m 5e UTP cable. I decided to cut off 3 m of unnecessary cable because I only needed 7 m. Then I mounted the RJ45 plug on the cut end by hand without a crimper. It seems to me that I installed it well because after connecting the computer to the modem there is an internet connection. The problem is that the internet has 250 mbps and the speed test is only 90 mbps. As far as I know, category 5e has a transmission of up to 1gb / s and it is lossless up to 100m. What I can say about the cable is that it looks like a normal cable, only instead of a copper wire in a single bundle there are many tiny silver wires twisted. Could this be the cause of the problem?

When the cable was 10 m (before you cut it) did you check the speed?

And before that, with what cable was it connected? Have you extended something? It worked before this fact ok, if so then the problem may occur.

xenox1234 wrote:

I fixed the RJ45 plug on the cut end by hand without a crimper.

I used a laptop for testing. If I connect a shorter cable from the set from the router, it is 250 mbps and I fastened the plugs twice (cut off the first one and attached the next one) to make sure.

According to you, what is the color scheme on the factory plug?

pin1 =?
pin2 =?
...
pin8 =?

@ xenox1234
Show photos of RJ45 tips from BOTH earned ends.
What did you clamp them with, checked the cable with some wiring tester?

Use an ohmmeter / pickaxe to check the transitions on each wire in the cable.

Added after 1 [minutes]:

Are you 100% sure that you have not mistaken the white-color of the wires?