Hi. Not sure I can be much help but, I am more sure than not that hyper threading should be causing this issue you are experiencing. I use an i9 (9900k) with hyper threading enabled and don't experience the issues you are. There's even a touch of an overclock. Have you made sure you are using the most up to date bios for your motherboard, with the most recent drivers for your chipset? Some motherboards will let you flash the bios from inside the UEFI set up. (My Asus z390-f does an internet bios update from inside UEFI screen.) I am not referring to the drivers that came on dvd with your system, but the updated version direct from the manufacturer's website. ###### The fact that you can run S1 on the 8 cores isn't too much of a performance loss. From what I have read there maybe a modest 30 - 40% increase in performance over having it switched off. It depends on how Studio One allocates their cpu resources, and Presonus are keeping that stuff private and rightfully so!
