What is your internet connection speed?
What is your internet connection speed?
I have a 500mbps internet connection that works well with my MacBook, but when I use the same cable on my PC with an ASUS motherboard called GA-AB350-Gaming 3 (rev. 1.x), it drops to just 100mbps. This happened before too on an Asus ROG flex x13 and it stays at that low speed even though everything else works fine on Windows. I connected the cable myself so I'm not sure if my job was done right, but since it runs smoothly with a Mac, I don't know why it's slow on Windows. I tried installing Lan drivers for the motherboard twice now, but nothing helped. Any other ideas?
Just try a different cable. If you don't have a tester, take a look at the other ends of the existing cable. The 10/100 network needs just four wires, but a gigabit setup needs all eight.
When you see 100mbps limit, it usually means the cable isn't good. A lot of fake cables are sold out there. The ones you probably buy that do not meet standards are often flat wire instead of proper ethernet. Since you made this yourself, maybe just one little connection was bad. Some devices work better with wires a little off than others. Even if you swapped the pairs, it's more likely one wire isn't touching inside the RJ45 plug well. Keeping all wires straight when crimping is hard and takes some skill. There isn't an easy fix; meters that cost too much money won't tell you what's wrong, and cheap ones might look okay but don't actually test if data goes through. The end result is you can't really save a poorly crimped plug. You'll probably have to cut off one end and start over. Maybe if you look closely with a magnifier, you might spot one wire that isn't fully in or something like that. That could help you guess which way to cut first.
I am using a speed of 500mbps on my Mac book, so I believe the cable isn't the problem. I even checked with the light up tester and every single one of the eight lights was beeping at the right time.
You have problems with two different computers, which means the problem is in the cable, not the port. You really want it fixed by replacing the cable. Speed negotiation happens at the hardware level using voltages and resistance, not through software or drivers. Your only choice is to buy a new motherboard or get an ethernet card that uses PCIe. Bad cables sometimes work on one device but fail on another. The tester you own isn't very good; I have one too, but compared to a $1000 Fluke meter, it's basically junk.