ASRock Forums : Ryzen unusual load in core0 https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 02 May 2026 06:27:25 +0000 Sun, 20 Aug 2017 08:53:22 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=4666 <![CDATA[ASRock Forums]]> https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ <![CDATA[Ryzen unusual load in core0 : So no one in this thread has heard...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=34556&title=ryzen-unusual-load-in-core0#34556 Author: parsec
Subject: 4666
Posted: 20 Aug 2017 at 8:53am

So no one in this thread has heard of the Ryzen Power Plan, whose purpose was to alleviate the core scheduling issue that Windows has (had) with Ryzen? If you are installing the newer AMD chipset drivers, you should also be getting the Ryzen Balanced power plan.

Yes, I saw this issue early on in my use of my Ryzen system, but that is long gone. If you are using Windows 10, and get continuing updates, the core scheduling issue does not exist, even if you don't use the Ryzen power plan. This issue is not a UEFI/BIOS issue.

If you are using Windows 7, which is not officially supported by Ryzen, then you may still have this issue, unless MSoft has an Ryzen update for Windows 7. I doubt that it does.

Issues with USB devices again are normally related to Windows 7 use, and the fact that only USB 3.0 drivers are used for ALL of the USB ports (2.0 and 3.0) on Ryzen boards, and all Intel boards starting with the 100 series chipsets. Windows 7 does not have a native USB 3.0 driver, so one must be included with Windows 7, or installed after a Win 7 installation, using a PS2 keyboard, with the PS2 emulator option enabled in the UEFI for a USB mouse.
]]> Sun, 20 Aug 2017 08:53:22 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=34556&title=ryzen-unusual-load-in-core0#34556 <![CDATA[Ryzen unusual load in core0 : Thanks for the info guys. I have...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=34553&title=ryzen-unusual-load-in-core0#34553 Author: day0
Subject: 4666
Posted: 20 Aug 2017 at 6:19am

Thanks for the info guys. I have an MSI B350 Tomahawk, driver version 17.10, same issue, so it's not a motherboard-only thing. I was afraid it was my ram that gave me problems earlier, but I'm not sure.

I already tried setting high performance on windows and nvidia control panel, but it didn't made any effect. Also, disabling HPET, SVM and core performance boost also doesn't fix the issue.

I have not related usb to this issue, because it seemed random, but now that you mentioned it, when I boot up my pc the motherboard recognizes my mouse, but sometimes windows doesn't, so I have to unplug and plug it again. Maybe it's related to this issue. ]]> Sun, 20 Aug 2017 06:19:56 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=34553&title=ryzen-unusual-load-in-core0#34553 <![CDATA[Ryzen unusual load in core0 : Zaccyi wrote:Hi mxpie, I&#039;m...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27875&title=ryzen-unusual-load-in-core0#27875 Author: mxpie
Subject: 4666
Posted: 25 Apr 2017 at 1:02am

Originally posted by Zaccyi Zaccyi wrote:

Hi mxpie, I'm now on BIOS L2.41 now (this was sent to me from ASRock tech support as I emailed them for assistance). After installing this BIOS and installing Windows 10 from scratch again (Creators update) I don't appear to have the issue any longer.

I previously updated to BIOS 2.22, which resolved the issue except for when I put the PC to sleep and woke it (which then resulted in the high Core 0 CPU usage). If I plugged in a USB device without sleeping the issue was resolved (although in this case I did not install Windows 10 from scratch, if I did, it could be that this would also have resolved the waking from sleep high Core 0 CPU usage).


Thanks for the update Zaccyi thats good to hear.  I kinda suspected the issue would be resolved eventually with the right BIOS revision.
]]> Tue, 25 Apr 2017 01:02:32 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27875&title=ryzen-unusual-load-in-core0#27875 <![CDATA[Ryzen unusual load in core0 : Hi mxpie, I&#039;m now on BIOS...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27810&title=ryzen-unusual-load-in-core0#27810 Author: Zaccyi
Subject: 4666
Posted: 23 Apr 2017 at 7:21pm

Hi mxpie, I'm now on BIOS L2.41 now (this was sent to me from ASRock tech support as I emailed them for assistance). After installing this BIOS and installing Windows 10 from scratch again (Creators update) I don't appear to have the issue any longer.

I previously updated to BIOS 2.22, which resolved the issue except for when I put the PC to sleep and woke it (which then resulted in the high Core 0 CPU usage). If I plugged in a USB device without sleeping the issue was resolved (although in this case I did not install Windows 10 from scratch, if I did, it could be that this would also have resolved the waking from sleep high Core 0 CPU usage).
]]> Sun, 23 Apr 2017 19:21:05 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27810&title=ryzen-unusual-load-in-core0#27810 <![CDATA[Ryzen unusual load in core0 : are you all on BIOS 2.20 now?...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27567&title=ryzen-unusual-load-in-core0#27567 Author: mxpie
Subject: 4666
Posted: 20 Apr 2017 at 1:21am

are you all on BIOS 2.20 now?  I'm still on 1.40 but was planning to update this weekend.  Overall I was mostly waiting for the bigger official update coming next month that is supposed to greatly improve RAM compatibility.  Hoping some other quirks like this might get ironed out with it as well.

My workaround for this stuck high core 0 issue in the mean time has been to just use my external drive dock with a separate USB card. 
like this

It's not 3.0, but the drive I use isn't fast enough to really matter anyway.


Edited by mxpie - 20 Apr 2017 at 1:22am]]> Thu, 20 Apr 2017 01:21:50 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27567&title=ryzen-unusual-load-in-core0#27567 <![CDATA[Ryzen unusual load in core0 : Also have the AMD all in 1 driver...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27079&title=ryzen-unusual-load-in-core0#27079 Author: toytown
Subject: 4666
Posted: 12 Apr 2017 at 12:40am

Also have the AMD all in 1 driver version 16.60 installed as seen in this picture
]]> Wed, 12 Apr 2017 00:40:10 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27079&title=ryzen-unusual-load-in-core0#27079 <![CDATA[Ryzen unusual load in core0 : Yes, I have already installed...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27061&title=ryzen-unusual-load-in-core0#27061 Author: Zaccyi
Subject: 4666
Posted: 11 Apr 2017 at 8:18pm

Yes, I have already installed the AMD all in 1 driver ver16.50.2601 from my motherboards download page (Asrock Fatal1ty AB350 Gaming K4).

I have a screenshot of the AMD all in 1 driver ver16.50.2601 (also with a HWINFO screenshot showing the usage when I plugged in the Xbox 360 Wireless Gaming Receiver):

http://i1259.photobucket.com/albums/ii549/Zaccyi/Screenshot_5_zpsi2exc4c6.jpg
]]> Tue, 11 Apr 2017 20:18:34 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27061&title=ryzen-unusual-load-in-core0#27061 <![CDATA[Ryzen unusual load in core0 : Have all of you installed the...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27059&title=ryzen-unusual-load-in-core0#27059 Author: wardog
Subject: 4666
Posted: 11 Apr 2017 at 7:45pm

Have all of you installed the AMD All-In-One driver(s) from your boards download pages?
]]> Tue, 11 Apr 2017 19:45:58 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27059&title=ryzen-unusual-load-in-core0#27059 <![CDATA[Ryzen unusual load in core0 : I just tried to plug in a Xbox...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27055&title=ryzen-unusual-load-in-core0#27055 Author: Zaccyi
Subject: 4666
Posted: 11 Apr 2017 at 7:34pm

I just tried to plug in a Xbox 360 Wireless Gaming Receiver into the USB3 port on the motherboard and the high CPU usage on Core 0 also occurs (varying between 70% - 85%), with the System interrupts on Resource monitor showing it's using 5% of the CPU. So it looks like the issue does not just occur with external drives.

Would the motherboard be faulty or would a new BIOS update fix this? I am already on BIOS v2.20.
]]> Tue, 11 Apr 2017 19:34:15 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27055&title=ryzen-unusual-load-in-core0#27055 <![CDATA[Ryzen unusual load in core0 : I also have the problem using...]]> https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27001&title=ryzen-unusual-load-in-core0#27001 Author: toytown
Subject: 4666
Posted: 11 Apr 2017 at 2:15am

I also have the problem using an Asrock AB350 Pro4 (1.40 Bios) motherboard.  It happens whenever i plug in a usb device like my USB Microphone or USB SD Card reader. 

Once its plugged in then the system interrupts will use core0 until i reboot windows, unplugging all of my USB devices inc keyboard/mouse does not fix it.  Plugging these devices in before windows boots, makes them work just fine.  Unplugging them and plugging the same device back in 100% usage on core0 due to system interrupts.

I've tried closing all applications and shutting down almost all windows services in an attempt to find out if i could resolve the issue with a reboot, sadly i cant.
]]> Tue, 11 Apr 2017 02:15:35 +0000 https://forum.asrock.com/forum_posts.asp?TID=4666&PID=27001&title=ryzen-unusual-load-in-core0#27001