Intel is changing the future of power supplies with its ATX12VO spec

Post by loeg » Mon, Mar 09, 2020, 11:31 PM UTC

michaelt wrote: post #28

mmastrac wrote: post #9

Earlier quoted context omitted.

Probably would allow very cheap power supplies w/built-in UPSes. 12V±5% voltage is the allowed range.

Most desktop users would probably prefer a UPS that also ensured their monitor stayed on.

Post by loeg » Mon, Mar 09, 2020, 11:36 PM UTC

baybal2 wrote: post #7

londons_explore wrote: post #4

Why does this still have 10 pins? 2 pins would be plenty. 12v Power, Ground, and an overlaid capacitively coupled 2 way data comms running at a few hundred khz to send and receive status messages, fan speeds, model/serial numbers, firmware/ temperatures, on/off commands, etc.

> Why does this still have 10 pins? 2 pins would be plenty. No, modern desktop can easily use up to 30A constant load. No way to provide so much over 1mm wires at 12V

Post by jmgao » Mon, Mar 09, 2020, 11:39 PM UTC

sjwright wrote: post #30

generatorguy wrote: post #6

Earlier quoted context omitted.

to deliver 1500 watts at 12v through one pin would be 125 amps. 5 pins each with 25A I would think you’d want at least 14 gauge per pin and even then I think they would be rather warm.

If you’re sending 1500 watts directly into a motherboard, something is probably wrong. Massive power draws (CPU, GPU) would always get their own direct connection, just as they do today. Apply this simple rule of thumb: watts become heat. The only major exception to this is where the power has exited the computer via USB or similar.

Post by hinkley » Mon, Mar 09, 2020, 11:42 PM UTC

klipklop wrote: post #31

generatorguy wrote: post #6

Earlier quoted context omitted.

to deliver 1500 watts at 12v through one pin would be 125 amps. 5 pins each with 25A I would think you’d want at least 14 gauge per pin and even then I think they would be rather warm.

Not all your power requirements will go directly to the motherboard though in that single connector. For example the GPU will have its own dedicated power plug(s). I would expect the motherboard to need < 500w for most systems.

Post by generatorguy » Mon, Mar 09, 2020, 11:43 PM UTC

sjwright wrote: post #30

generatorguy wrote: post #6

Earlier quoted context omitted.

to deliver 1500 watts at 12v through one pin would be 125 amps. 5 pins each with 25A I would think you’d want at least 14 gauge per pin and even then I think they would be rather warm.

If you’re sending 1500 watts directly into a motherboard, something is probably wrong. Massive power draws (CPU, GPU) would always get their own direct connection, just as they do today. Apply this simple rule of thumb: watts become heat. The only major exception to this is where the power has exited the computer via USB or similar.