Intel Motherboards - Realtek 2.5GBE controller won't negotiate gb speed

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Realtek 2.5GBE controller won't negotiate gb speed

Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=10565
Printed Date: 05 Aug 2025 at 11:28pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Realtek 2.5GBE controller won't negotiate gb speed

Posted By: atekido
Subject: Realtek 2.5GBE controller won't negotiate gb speed
Date Posted: 30 Dec 2018 at 1:57am

on the Phantom gaming 9 motherboard it has the 2.5GBE realtek network adapter but it only connects/negotiates to 100mb. I have the current Motherboard bios updates and the current network driver for the adapter.

Facts
IT is not any hardware within my network. I am hard connected straight to my windstream gigabit fiber connection. no routers or switches and can attain gigabit speeds with the other intel controllers.

IT is not a cable issue. the same cable runs gigabit speeds just fine on the other intel adapters on the motherboard.

I contacted your support page over a week ago and have got no response... Great customer service!

Replies:

Posted By: atekido
Date Posted: 30 Dec 2018 at 1:59am

win10x64 professional
9700k processor
Windstream kinectic gigabit internet
16gb ram

I forgot to add I tried forcing the settings of the adapter to negotiaite 1000 and the 2.5gb and it still only connects 100mb.

Posted By: atekido
Date Posted: 14 Jan 2019 at 9:44am

ASrock has yet to reply back to me after I filled out their support request on the websiteover 3 weeks now. Will not purchase another ASrock product with this type of customer service or lack thereof.