@toast @tk the VRM design requirements for 3.3V and 5V are absolutely nothing compared to the insane requirements for PDN at the CPU core frequency, and that's all done on-board

there's really no reason to have them off-board these days i think
@steph @toast I still don't get good feelings from typical consumer electronics, which have been a race to the bottom for a long time.
@tk @toast well why trust a psu over a motherboard then? They're both consumer electronics

the motherboard people have a great handle on advanced power delivery to design their VRMs and decoupling up to several hundred megahertz, they have to be good or the CPU plain doesn't work

so if I were to trust someone to do value engineering with the right tradeoffs it'd be the motherboard people really
@steph @toast Don't the PSU manufacturers specialize in, well, power supplies?
@tk @toast but by far the most complex power supply in the system is already *on* the motherboard, that's what VRMs are!

Guaranteeing insanely low ripple specs at 1.1V and designing the PDN impedance up to several hundred megahertz to be <25mOhm is a very hard task, especially to a budget. A lot harder of a task than designing a 12V to 3.3V and 5V converter with an order of magnitude or two looser tolerances.
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@steph @tk @toast
You sound like you understand the electronics...

What is a best way to learn how to create your own circuits? (I wish to build robots one day...) :ablobmeltsoblove:

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