3 ms·
> You can design it around the old 12V standard but why? For reference, the amperage leading into the house is typically around 100A; you only need around 24A f
by nordsieck 4y ago
> You can design it around the old 12V standard but why? For reference, the amperage leading into the house is typically around 100A; you only need around 24A for an electric range / oven. 50A at 12V is probably not optimal.
In your opinion, if you could force power supply makers to add another voltage rail, which voltage would you pick?
- davrosthedalek 4y ago48V is kinda industry standard, and just below "low voltage" thresholds is most jurisdictions (often 50 or 60V). The cards have switching stages anyway, so it's not that much change (but probably means different power transistors)
- xnyan 4y agoThere's not exactly a right choice of voltage per say, it's more of which tradeoffs you are willing to accept. Nothing is free, and higher voltage means more noisy, complex, and expensive SMPS power supplies. Solving for the problems of higher current, lower voltage DC we use in ATX format supplies today requires higher gauge copper, but the cable run between the GPU and PSU is so shot that the cost of extra copper could very well be less than the increased cost of a higher voltage supply.