Maybe @Sven will answer. I be cheap (enjoy hobo pillows)
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Think renehoj right when wrote
I don’t think it’s impossible that none of the CPU features are needed for AMT, and that it can run on any version of IME as long as you have a chipset that supports AMT. My guess would be that the chipset and not the CPU decides if you can use AMT
Edit: found and added pillow link