ASRock Forums : Speedstep does not work on Z97 Killer

ASRock Forums : Speedstep does not work on Z97 Killer https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 12 May 2026 08:23:38 +0000 Wed, 16 Dec 2015 12:17:53 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=1535 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Speedstep does not work on Z97 Killer : I have a Z97 Killer with a 4790k....]]> https://forum.asrock.com/forum_posts.asp?TID=1535&PID=7130&title=speedstep-does-not-work-on-z97-killer#7130 Author: robstl
Subject: 1535
Posted: 16 Dec 2015 at 12:17pm

I have a Z97 Killer with a 4790k. I have it overclocked at 4.8 Ghz (though the speed in this case does not matter). With Speedstep on in the BIOS, CPU-Z and Intel Extreme Tuning Utility never go higher than 4 Ghz even though they both show the multiplier is 48. With Speedstep off, the CPU always runs at 4.8 Ghz, even when the CPU is idle at 2% usage.

I have tried various combinations of settings in the BIOS but I can never get Speedstep to work properly, meaning to clock the CPU down and up as demand dictates.

I don't know if this is related, but I found that Minimum Processor State (and Maximum Processor State) is missing from my Power Options in Windows 7 64-bit. I tried adding them to the registry but the options never appear even though I get the message that the entries were added successfully.

]]> Wed, 16 Dec 2015 12:17:53 +0000 https://forum.asrock.com/forum_posts.asp?TID=1535&PID=7130&title=speedstep-does-not-work-on-z97-killer#7130