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A comment on A Grace Blackwell AI Supercomputer on Your Desk – Nvidia DGX Spark. Parent comment

Re:A Grace Blackwell AI Supercomputer on Your Desk – Nvidia ... by aurareturn on Thursday August 28, 2025 @11:49PM (#45059947) 

  Memory controllers are die area. mm2 die space is linear bom cost.
Ignoring the design and platform support that comes with higher bandwidth memory controllers.
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Re:A Grace Blackwell AI Supercomputer on Your Desk – Nvidia ... by throwaway48476 on Friday August 29, 2025 @02:22AM (#45060831)
And this is not also linear or fixed cost, why?

I don't think you know how industry pricing works. Wafers have a price, double mm2, double the price of chip in bom.

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Re:A Grace Blackwell AI Supercomputer on Your Desk – Nvidia ... by aurareturn on Friday August 29, 2025 @09:00AM (#45063542)
Yes. Bigger die size. More complex memory controller designs. More memory lanes. More software support for higher memory lanes. All adds up.

I'm explaining why despite memory being a commodity, high memory bandwidth VRAM cost is not cheap.

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Re:A Grace Blackwell AI Supercomputer on Your Desk – Nvidia ... by throwaway48476 on Friday August 29, 2025 @12:07PM (#45065897)
Memory controllers are copy paste. It's not more complex.

It's more expensive in a linear way wrt bom.

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