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Discussion Starter · #1 ·
Thought I may share my findings.

Not sure if this is the right category, or if there is a generic "Motherboards" category as this may apply to more than just Intel boards.

I worked out the pinout, and how to flash both the Main and Backup BIOS chips on my ASRock Z370 Extreme4 (after trying to diagnose why it died after two hours; have returned it and have another on the way).

The pinout is based on a common SPI flash header, but is undocumented in ASRock's manual.

 
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