I'm using the Asus X99-DELUXE-II motherboard:

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It stands for High Amperage Fan. There should be a header (pins) on the board for you to plug in multiple fans or fans that are higher current. H-Amp fans usually have better cooling.

The manual setting for that board would allow you to set measure points and min/max temperatures, etc.

Search "High AMP" at this Asus page: https://www.asus.com/us/Motherboards/ROG-RAMPAGE-V-EDITION-10/

  • 1
    Is a HAMP port compatible with normal-amp fans, or does it require a HAMP fan/controller?
    – tsilb
    Oct 9 '20 at 4:57

It is High AMPerage header connection for a fan on Asus motherboards, which can provide up to 3 A for powerful fans.

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