3 ms·
>Would it make sense to move the power delivery stuff to a separate, longer-lived part? Likely no, the voltage regulation is already hard being that close to t
by xxs 6y ago
>Would it make sense to move the power delivery stuff to a separate, longer-lived part?
Likely no, the voltage regulation is already hard being that close to the chips and memory. A modern vrm for rtx 3090 is 16 phase by 70A stage. The gpus already have multiple power pins and with so high amps the losses in the conductor become non-trivial, hence voltage regulation is even more difficult.
Moving it farther away would make the regulation extremely conservative, overshooting and delivering too high voltage.
Even if all that happens GPUs would still require massive amounts of filtering caps.
- baybal2 6y agoI believe transformer based "VRMs" (they are actually unregulated) like these https://www.techspot.com/images2/news/bigimage/2020/05/2020-05-14-image-22.jpg https://www.techspot.com/images2/news/bigimage/2020/05/2020-... is the future as a way more practical way to deal with power supply of few hundred Amp chips. 16 phase buck controllers are greatly, greatly impractical, and the only reason the industry is stuck with them is that nobody was brave enough to do serious research into making responsive magnetic based DC-DC, while everybody knew that such thing should be possible. It's interesting curiosity how Taiwanese made it an industry trend out of multi-phase bucks because people who were making first PCs in Taiwan had rather subpar electronics engineering education, or were basically self-taught, and designed computer boards by trial end error back in nineties.