Not all processor cores identified in Ryzen 9 3900x
Not all processor cores identified in Ryzen 9 3900x
I recently purchased a Ryzen 9 3900x and when I visited Cinebench R20 to test it, it reported a 12-core processor. Underneath, the details listed only 6 cores with a GHz value. Using HWMonitor, it displayed voltages, GHz, and temperatures for just the 6 cores. I downloaded HWMonitor and confirmed it showed only the 6-core information. Clearing BIOS didn’t help. In Resource Monitor, it still reflected all 12 cores. I’ve attached screenshots of Cinebench and HWMonitor for your reference.
Hello, thank you. The resource monitor indicates six cores are active, but it seems one CCD is disabled. Could you tell me the motherboard model you're using? Have you installed any BIOS updates recently? Also, please replace HWmonitor with HWiNFO for better monitoring.
Running on an ASRock A520 X570 Steel Legend, I haven't updated the BIOS yet.
Confirming BIOS reset initiated. Check if Ryzen Master is present.
Have you tried Ryzen Master? When you activate Game Mode it disables the CCD. Alternatively, with Profile 1 or 2 you can achieve this by switching on Active CCD Mode in the cores settings.