Graham Sutherland / Polynomial on Nostr: buildzoid did a video on the ASUS Direct Power Bridge, which is the marketing term ...
buildzoid did a video on the ASUS Direct Power Bridge, which is the marketing term for a copper bus bar they put on the back of some GPUs to reduce the resistance of the Vcore power rail.
it's a gimmick - while it does reduce the voltage drop across the plane from ~66mV to ~22mV, that doesn't make any useful difference to Vcore regulation because the VRM feedback is from the point of load anyway.
but the most interesting thing is that it does not particularly affect power rail *impedance*.
Published at
2024-01-07 21:28:09Event JSON
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"content": "buildzoid did a video on the ASUS Direct Power Bridge, which is the marketing term for a copper bus bar they put on the back of some GPUs to reduce the resistance of the Vcore power rail.\n\nit's a gimmick - while it does reduce the voltage drop across the plane from ~66mV to ~22mV, that doesn't make any useful difference to Vcore regulation because the VRM feedback is from the point of load anyway.\n\nbut the most interesting thing is that it does not particularly affect power rail *impedance*.",
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