If you hover over the question mark it tells you that if you want to disable it that you need to go into your BIOS. I'm not 100% but possibly it was removed to improve stability. Directly disabling or enabling via the BIOS is the logical place to do this. But perhaps @AMD_Vik might know more. There doesn't appear to be any mention of the change in any release notes. Is there a reason you want to be able to disable it? With it enabled you're basically reducing bottlenecks and getting larger, more efficient data transfers, and improved performance.SAM is enabled with no button to disable it!

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