Limited ethernet speed

[A_New_Account]

Hello.

I have an msi B460m-a pro, which has a Realtek rtl8111h gigabit lan, and when do I connect it to internet by an Cat 5a cable, it only shows 100Mb/s of speed (on speedtesters online it only shows 90Mb/s), even when I have hired 800Mb/s internet speed.

 

I don't know if I'm being limited by the motherboard (the Realtek gigabit lan) or if it's a setting in the BIOS/Operating System I didn't set up correctly.

[Eigenvektor]

I would suspect you're limited by the modem/router instead. Does it have a gigabit port?

 

Some routers also have power save options that can limit speed. Check if yours has something like that.

[ki8aras]

19 minutes ago, A_New_Account said:

Hello.

I have an msi B460m-a pro, which has a Realtek rtl8111h gigabit lan, and when do I connect it to internet by an Cat 5a cable, it only shows 100Mb/s of speed (on speedtesters online it only shows 90Mb/s), even when I have hired 800Mb/s internet speed.

 

I don't know if I'm being limited by the motherboard (the Realtek gigabit lan) or if it's a setting in the BIOS/Operating System I didn't set up correctly.

90mb/s on a speed test = 720mbit (im assuming you mean you have 800mbit internet)

if thats not the case then you may just need ethernet drivers

[SImoHayha]

49 minutes ago, A_New_Account said:

Hello.

I have an msi B460m-a pro, which has a Realtek rtl8111h gigabit lan, and when do I connect it to internet by an Cat 5a cable, it only shows 100Mb/s of speed (on speedtesters online it only shows 90Mb/s), even when I have hired 800Mb/s internet speed.

 

I don't know if I'm being limited by the motherboard (the Realtek gigabit lan) or if it's a setting in the BIOS/Operating System I didn't set up correctly.

you're probably limited by a 2nd intermediary connection. If you have a old router or modem most of them only support up to 100 MBPs unless there is an option on your router to enable faster port speeds

[MrSimplicity]

yeah, there's a difference betweens MB/s and Mbps. Mbps (mega"bit" per second) is the moniker that ISPs use cuz of the inflated looking speed and download speed is in MB/s (mega"byte"s per second). So you're probably paying for 800Mbps which is 100 MB/s. 8 bits in a byte. 

[mariushm]

The network card is capable of gigabit speeds ( 1000 mbps , 125 MB/s ) 

 

Any ethernet cable (Cat5e, Cat6, Cat6a) is capable of transferring 2.5 gbps (2500 mbps) or more, as long as the wires are arranged correctly at both ends of the cable.

 

In order to get 1000mbps, all the elements in the chain must be capable of 1000 mbps - the ethernet card is, the cable is ... the connector on the switch or modem or device the ISP gave you must also be capable of 1000 mbps.

 

 

[QuantumRand]

I'm assuming you're on Windows, so there's a few ways you can check what speed your ethernet is connected at. Here's a handy article that walks you through several ways of checking: https://www.makeuseof.com/windows-check-network-adapter-speed/

 

If you're not connected at 1000mbps/1gbps, then either your ethernet cable is bad, or your router/modem/switch does not support gigabit ethernet.

 

If it does say that you're connected at gigabit speeds, then you're being limited by your ISP. I think this is likely the case since the math of your reported speeds checks out. 800mbps (MegaBits per second) is expected to get you about 90MB/s (MegaBytes per second). There are 8-bits to a byte, and when you factor in some protocol overhead, 90MB/s seems about right.

[A_New_Account]

Thanks, I'll try all of that tomorrow when I get back to my home.

 

About the limit of the router, I tried with another pc with and Cat 5a cable and it showed me the 800Mbps I expected. So then, tomorrow i'll check that article as, yes, I'm using windows.

[Alex Atkin UK]

12 hours ago, A_New_Account said:

Thanks, I'll try all of that tomorrow when I get back to my home.

 

About the limit of the router, I tried with another pc with and Cat 5a cable and it showed me the 800Mbps I expected. So then, tomorrow i'll check that article as, yes, I'm using windows.

Did you try a different cable on the problematic PC in the router port you confirmed works okay with the other PC?

 

Marginally performing cables can cause problems on some network adapters but not others and dropping to 100Mbit is typically what would happen.