Well How to explain this? The SSDT tables are kind of DSDT enhancement as they are loaded within the same namespace. There is usually one main SSDT, (often with the ID "CpuPm"), while further SSDTs are static part of ROM. Those further SSDTs define the actual P-States for each core of the CPU. You will need to have all the SSDTs memory adresses to dump them.
I would recommend you to do this from within Linux or BSD, where you can get the SSDTs adresses from the kernel message buffer, then you use acpidump to create AML files from those adresses - I am not familiar with Windows / AIDA64 software - sorry.

Keep always in mind, that changing BIOS settings or CPU will effect those ACPI tables!!!

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