Question Capable hardware stuck at 100mbps

[obexx]

I've got a bit of an issue. I recently purchased a brand new 75ft CAT6 ethernet cable from Onn (I know bad company, best I can do for now), which is advertised to reach speeds "Up to 1gbps". My mobo is the Asus Prime Z390-A. I literally have the latest intel gigabit ethernet drivers. The cable is routed from my router upstairs to my ethernet slot on my mobo (yes I have tried plugging the cable directly into my modem). I have a gigabit fiber-optic internet plan. I know that my router is capable of outputting 1gbps via ethernet, as when I log into it's gui I can see that my Genie 2 is pulling 1gbps. Yes, I have tried switching my cable to the Genie 2's ethernet slot on the router. Even when I change my adapter settings to try and forcefully pull 1gbps full duplex (I am aware you should stick to auto negotiation), my pc acts as if there isn't even an ethernet cable plugged in. This has been pretty frustrating. I really hope it's the PC's fault, as I might have just routed this all the way from upstairs for nothing.

 

[drivinfast247]

Go buy a short, real Cat5e cable and test it.

 

[obexx]

Go buy a short, real Cat5e cable and test it.

No I actually literally just fixed it after like a week of this issue (ik right after I posted sorry)

My solution: Was getting worried that I broke the cable while routing it, so I just connected my PC to wifi and unplugged the ethernet from my PC and plugged it into a Raspberry Pi 4 B I had lying around, I then logged into my router's gui via web and saw that it's port was pulling a gig. Phew. I then plugged the ethernet back into my pc and finally, its pulling @ 1gbps. No, the connectors weren't dirty (as I had unplugged the cable from my mobo and cleaned the connector a million times), but something sure did happen. I guess it was magic. I swear I'm cursed.

BTW, I'm not quite sure why you said "real" cat5e, as I have previously mentioned, my cables are cat6. Cat6 cables have a better bandwidth. A cable isn't really "real" or not its just a cable. Unless you were referring to Onn being a crappy brand 😂 I defiantly should have tried another cable, I just can't move my 35 pound PC around quite easily, especially without it's peripherals so it will actually post past boot manager. I would need my PC to see if it was a hardware issue with my PC.

 

[bill001g]

What he means my a "real" cable is one that meets actual certified specs to be a ethernet cable. The words "CAT5e" and "CAT6" etc themselves mean nothing. The real certifications are things like EIA/TIA based things.
The vast majority of what you find being sold on amazon and ebay are not actual ethernet cables. You find massive amounts of that flat or thin wire which has wire sizes too small and automatically disqualifies it from being a certified ethernet cable.

These cables do "mostly" work but they have trouble on some machine and the fail much more commonly.

 

[obexx]

What he means my a "real" cable is one that meets actual certified specs to be a ethernet cable. The words "CAT5e" and "CAT6" etc themselves mean nothing. The real certifications are things like EIA/TIA based things.
The vast majority of what you find being sold on amazon and ebay are not actual ethernet cables. You find massive amounts of that flat or thin wire which has wire sizes too small and automatically disqualifies it from being a certified ethernet cable.

These cables do "mostly" work but they have trouble on some machine and the fail much more commonly.

Cable wasn't from an online store, but it also was in a way. Got it from somewhere just as risky as Amazon. Has RJ45 ends, 8 conductors, wire insulation, and shielded. Pretty "real" to me.
Just labeling my cable CAT6 was sort of my way of saying it is an up to E/T standard/cert cable. Sorry about that I should have explained better. Thanks for the reply that's my bad.