Intel Motherboards - Z890 Pro RS WiFi C-States and turbo issue

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Z890 Pro RS WiFi C-States and turbo issue

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=113317
Printed Date: 05 Sep 2025 at 2:15pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: Z890 Pro RS WiFi C-States and turbo issue

Posted By: Curvin
Subject: Z890 Pro RS WiFi C-States and turbo issue
Date Posted: 03 Sep 2025 at 5:59am

Hi,

New to AsRock motherboards, currently testing and qualifying a Z890 Pro RS WiFi with an i9 Ultra 285K, and on disabling the CPU C-States when tweaking my CPU power/clocking settings, I have noticed that it stops the CPU from turbo clocking as it should, and does not clock above the base clock (3.6Ghz).

I build workstations, so I disable EIST/SpeedShift/C-State setting as a rule, and on other Z890 boards it will raise the base clock to the All Core Turbo, which is the normal and expected behavior. Something I have experienced and confirmed over several generations of Intel chipsets, including Z890. On the AsRock board however, disabling the C-States with those other settings disabled only allows max base clock ?

Is there something obvious I am missing ?

Any suggestions advise greatly appreciated.