SVM Mode On + HyperV Install => BCLK unstable

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   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.

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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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TrakRailySurely Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Jun 2017 Status: Offline Points: 13	Post Options Post Reply Quote TrakRailySurely Report Post Thanks(0) Quote Reply Topic: SVM Mode On + HyperV Install => BCLK unstable 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 ----------

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply 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.

wardog Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 15 Jul 2015 Status: Offline Points: 6447	Post Options Post Reply Quote wardog Report Post Thanks(0) Quote Reply 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

avinicius Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 28 Jun 2018 Status: Offline Points: 7	Post Options Post Reply Quote avinicius Report Post Thanks(0) Quote Reply Posted: 28 Sep 2018 at 2:46am
	Same thing happens with my AB350M Pro4, tested with BIOS 4.70 and 5.00.
	AMD Ryzen 5 2400G \| ASRock AB350M Pro4 \| G.SKILL Ripjaws V @ 3000 MT/s 16-16-16-35 (2x8 GiB) \| Seasonic S12II-430

xhue Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 17 Aug 2018 Status: Offline Points: 634	Post Options Post Reply Quote xhue Report Post Thanks(0) Quote Reply 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.