Everything you describe doing, is all possible with Intel ME tools; for z790 you’re looking at CSME 16.1 ideally, and don’t deblob it, use MFIT.exe inside the CSME tools, that tool is Intel’s internal developer tool, and it can effectively reinitialize the ME, null the ME; and you can extract, modify, reload into Mfit.exe which will build it into the full CAP / ROM.
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