Ryzen Cores Disabled

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adamcbaxter808

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Sep 6, 2017
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Hi all, I've read a couple of threads on this but none of them have really been able to help me with this issue. I have a Ryzen 5 1600x, ASRock AB350 Pro4 AM4 mother board, MSI Armor GTX 1070, WD M.2 SSD, and Ripjaws V 2x4GB 2133 MHz RAM. My issue that only one of my ryzen cores is currently active. It used to be that three were active, but I was messing around in SMT, cool n' quiet and such and now there's only one active. I currently have SMT on, and cool n' quiet disabled. In device manager, it shows all twelve threads, however, in task manager it only shows one core process. I tried manually setting the cores to "six (3+3)", but that did nothing. Any help or insight on this would be greatly appreciated.
 
Solution
clutchc
Too late now to check, but I was going to have you go to system config/boot/advanced options to see if somehow Win had set the number of processors (cores actually) to the wrong number. Mine has the check box unchecked, as yours probably is now. But if yours had been checked (somehow) and the number processors was wrong, that may have been the problem.
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adamcbaxter808

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Sep 6, 2017
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No I did not, even stranger, I just tried it and there are three logical processes. I used CPU-Z and it says there are 2 cores and 3 threads, which is consistent with what I just found in task manager. However, AMD Ryzen Master still says only 1 core is in use.
 
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clutchc

clutchc

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Apr 22, 2009
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One core in a Ryzen is actually 2 cores. It uses a single module containing 2 cores. But that doesn't explain why you aren't showing all the cores. It has to be a setting you inadvertently set in BIOS to disable modules. Why not reset the BIOS to default and see if it goes back to normal? If you have important settings you've changed for OC'ing, you can save a profile in BIOS first.
 
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adamcbaxter808

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Sep 6, 2017
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Right, one's a virtual core allowing for twelve threads total. I reset the BIOS multiple times and nothing. I ended up doing what I was trying to avoid in the first place and reinstall Windows and it seems back to normal. However, I don't want to have to go through this again as I do plan on trying to overclock again. Any suggestions?
 
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clutchc

clutchc

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Apr 22, 2009
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Too late now to check, but I was going to have you go to system config/boot/advanced options to see if somehow Win had set the number of processors (cores actually) to the wrong number. Mine has the check box unchecked, as yours probably is now. But if yours had been checked (somehow) and the number processors was wrong, that may have been the problem.
 
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