p-state that undervolts HBM (VID map posted, memory voltage register access unknown, estimated 2 W gain); ASPM link-speed drop at idle

Swimlane: Default swimlane
Column: Idea
Position: 7

Description

Reported by / on it: @matstatman, @vcore2191, @robbbbbb7973

Source: https://discord.com/channels/1518634379604136178/1534543856006332586/1562507739715084292

Wiki page: P-states and idle power

Cards: both

Card D-091, seeded from the cmpunlocker Discord with credit (reference discord:1562507739715084292).

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