Reply to post: RE: Mini-Fit

Creator of spec for melting RTX 4090 cables urges Nvidia, others to 'ensure user safety'

Snake Silver badge

RE: Mini-Fit

Are you sure they will be better? The Molex page for the Mini-Fit line

https://www.molex.com/molex/products/family/minifit_power_connector_solutions

states "up to 13.0A".

Note that I am *not* a trained electrical engineer, so I'm BOUND to be flamed for this. But if you look at the specifications on the Mini-Fit system

https://www.molex.com/pdm_docs/ps/PS-45750-001-001.pdf

(page 9)

each wire-to-board circuit rating whilst using 16g wire is only 8.5A max. Therefore to get 600W @ 12V via 8.5A @ max circuits requires 6 circuits, and that's at maximum, read optimized and ideal, rating. So a 12-conductor Mini-Fit will be taken up exclusively with the 12V positive and ground circuits, never mind sensing and any other signals desired across the connector.

IMHO the entire plan is flawed. Using these micro-style pin connectors to handle 600W @ 12V is a long-term design mistake; a larger connector should have been specified regardless of the board space used. IMHO they were thinking of optimum packaging utilization to keep the board designers happy but left not a lot of room for overload due to a variety of factors, or even long-term increase in connector resistance due to surface oxidation.

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