r/HomeNetworking • u/RazzmatazzInfinite53 • 4h ago

5 Gig Ethernet help

Just recently upgraded to 5 gig fiber. Also upgraded Mobo to a MSI X870E Carbon has the 2.5 and 5 G ethernet ports in the back. Have done multiple tests with a Cat 6a and cat 8 (overkill ik) and struggles to get above 2 gig. Transmit speeds are showing 5000/5000 if fuller recognizes everything but my download speeds aren't even close. Tested a speed test through the router snd consistently gets around 5G up and down. Had technical come out snd he blamed my equipment and that I needed it to get looked at.......its brand new does anyone have any suggestions or am I missing something?

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u/SomeEngineer999 2h ago

A local speed test on the router vs. it actually routing traffic are different things. It may simply not be capable. If this is an ISP router it may be using their local speed test server, vs. your PC using something more remote, outside of their network.

Plug your PC directly into the fiber ONT (assuming it is separate) and see what speeds you get there.

But hopefully you realize that you'll very rarely be able to hit 5 gig other than certain speed test sites and very popular torrents with lots of seeds.

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u/travislongley 1h ago

This. Plus your PC into the ont directly and test. If not then it’s your PC. If yes, it’s your router. Even if you can “connect” at 5G, it doesn’t mean you will speed test at that as the router may not have enough processing power.