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A comment on Video RAM Transplant Doubles RTX3070 Memory to 16GB. Parent comment

Re:Video RAM Transplant Doubles RTX3070 Memory to 16GB by xxs on Wednesday March 24, 2021 @01:18PM (#26570163)
>We already have 6 and 8 pin additional connectors on graphics cards, so the connector/slot aspect is easily solved.

Those 8 pins are 12V, not 1V. They are spec'd to carry like 12.5A each - make it 15A - bit warmer wires. So around 15W per connector at 1V... and the need is over 300W. So there you have it 20 8-pin connectors.

There is a reason power lanes of the grid are higher voltage - they need a lot less current, so they are efficient. Lower voltage should remain on the PCB with multiple power planes.

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Re:Video RAM Transplant Doubles RTX3070 Memory to 16GB by sokoloff on Wednesday March 24, 2021 @01:26PM (#26570275)
To argue alongside your excellent points: it's not just bit warmer wires, but also the underlying voltage drop that would be harmful in such a design, especially in the context of a 1V DC supply.
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