ASRock Forums : SVM Mode On + HyperV Install => BCLK unstable https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 20 Apr 2026 20:53:53 +0000 Fri, 28 Sep 2018 02:59:05 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=8615 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[SVM Mode On + HyperV Install => BCLK unstable : It&#039;s &#039;normal&#039; or...]]> https://forum.asrock.com/forum_posts.asp?TID=8615&PID=56558&title=svm-mode-on-hyperv-install-bclk-unstable#56558 Author: xhue
Subject: 8615
Posted: 28 Sep 2018 at 2:59am

It's 'normal' or at least - expected. AFAIK SVM and other VM stuff abstracts or hides the real HW and clocks/timers from both host and guest. IDK, might be wrong.

I believe BLCK is actually ticking at a stable rate, it's just a matter of readings and reporting. Or I may be totally wrong.

I'll be dropping a ticket to ASRock. I advise you all to do the same.
]]> Fri, 28 Sep 2018 02:59:05 +0000 https://forum.asrock.com/forum_posts.asp?TID=8615&PID=56558&title=svm-mode-on-hyperv-install-bclk-unstable#56558 <![CDATA[SVM Mode On + HyperV Install => BCLK unstable : Same thing happens with my AB350M...]]> https://forum.asrock.com/forum_posts.asp?TID=8615&PID=56557&title=svm-mode-on-hyperv-install-bclk-unstable#56557 Author: avinicius
Subject: 8615
Posted: 28 Sep 2018 at 2:46am

Same thing happens with my AB350M Pro4, tested with BIOS 4.70 and 5.00.
]]> Fri, 28 Sep 2018 02:46:35 +0000 https://forum.asrock.com/forum_posts.asp?TID=8615&PID=56557&title=svm-mode-on-hyperv-install-bclk-unstable#56557 <![CDATA[SVM Mode On + HyperV Install => BCLK unstable : Sorry. Had to grab a backup drive...]]> https://forum.asrock.com/forum_posts.asp?TID=8615&PID=51079&title=svm-mode-on-hyperv-install-bclk-unstable#51079 Author: wardog
Subject: 8615
Posted: 06 May 2018 at 10:33am

Sorry. Had to grab a backup drive to locate this in-depth link to understand.

https://www.anandtech.com/show/2480/9

hth
]]> Sun, 06 May 2018 10:33:47 +0000 https://forum.asrock.com/forum_posts.asp?TID=8615&PID=51079&title=svm-mode-on-hyperv-install-bclk-unstable#51079 <![CDATA[SVM Mode On + HyperV Install => BCLK unstable : I have seen that here. As others...]]> https://forum.asrock.com/forum_posts.asp?TID=8615&PID=51078&title=svm-mode-on-hyperv-install-bclk-unstable#51078 Author: wardog
Subject: 8615
Posted: 06 May 2018 at 10:29am

I have seen that here. As others on the net have too.

It is my understanding that this is a normal occurrence as SVM is completely contained and executed within the processor itself.

I've also personally experienced my OC's be hampered with SVM Enabled, FWIW.
]]> Sun, 06 May 2018 10:29:53 +0000 https://forum.asrock.com/forum_posts.asp?TID=8615&PID=51078&title=svm-mode-on-hyperv-install-bclk-unstable#51078 <![CDATA[SVM Mode On + HyperV Install => BCLK unstable : Hi.I installed it because I want...]]> https://forum.asrock.com/forum_posts.asp?TID=8615&PID=51073&title=svm-mode-on-hyperv-install-bclk-unstable#51073 Author: TrakRailySurely
Subject: 8615
Posted: 06 May 2018 at 9:34am

Hi.

I installed it because I want to use virtual environment Hyper-V.
I activated CPU SVM in the BIOS.

When SVM was enabled, BCLK was fixed,
Installing Hyper-V will make BCLK unstable.

Is there the same phenomenon?
Why did you fix it?

Help me.

----------
Windows 10 Pro April 2018 Update (Build 17134.5)
Ryzen 7 1700
X370 Gaming K4

Power Plan : AMD Ryzen Balance Plan

Stable BCLK Clocks -> 99.84
UnStable BCLK Clocks -> 97.86 - 98.47
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