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| What is the motivation of intel to want PSUs that are 12V only? |
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| coppice:
--- Quote from: OwO on March 05, 2020, 04:19:06 pm ---Personally I would go with 70V. It's the highest I can still comfortably touch and at this level the higher the better. The DC-DC converter on the motherboard doesn't have to be transformerless. --- End quote --- Nobody is going to standardise a mother board voltage that high. It would classify the board as dangerous, and require shielding to restrict a user's access to it. One of the reasons PCs have done so well is the flexibility that came from having all the high voltage stuff packaged in a small shielded box, so the ordinary user can have free and easy access to anything inside the PC's case. The EU's Low Voltage Directive is probably the benchmark for the highest voltage you will see leaving the fully encased power supply of any computer in the foreseeable future. |
| langwadt:
--- Quote from: coppice on March 06, 2020, 12:58:29 am --- --- Quote from: OwO on March 05, 2020, 04:19:06 pm ---Personally I would go with 70V. It's the highest I can still comfortably touch and at this level the higher the better. The DC-DC converter on the motherboard doesn't have to be transformerless. --- End quote --- Nobody is going to standardise a mother board voltage that high. It would classify the board as dangerous, and require shielding to restrict a user's access to it. One of the reasons PCs have done so well is the flexibility that came from having all the high voltage stuff packaged in a small shielded box, so the ordinary user can have free and easy access to anything inside the PC's case. The EU's Low Voltage Directive is probably the benchmark for the highest voltage you will see leaving the fully encased power supply of any computer in the foreseeable future. --- End quote --- I always thought the limit was 50V, but it seems the EU limit is 50V AC and 75V DC |
| NiHaoMike:
--- Quote from: Red Squirrel on March 05, 2020, 07:40:38 pm ---Would be cool if they made it 13.5v actually, would make power backup simpler, just needed a battery set to float voltage. Currently, PCs have lot of power rails so doing a straight DC type backup would be too complex. 3.3v, 5v, 12v, -12v... I feel I'm missing one. Is there a -5v? --- End quote --- Lead acid is old technology that's declining as lithium becomes cheaper. The existing 12V standard matches up with a 3S pack pretty well. |
| langwadt:
--- Quote from: NiHaoMike on March 06, 2020, 01:12:55 am --- --- Quote from: Red Squirrel on March 05, 2020, 07:40:38 pm ---Would be cool if they made it 13.5v actually, would make power backup simpler, just needed a battery set to float voltage. Currently, PCs have lot of power rails so doing a straight DC type backup would be too complex. 3.3v, 5v, 12v, -12v... I feel I'm missing one. Is there a -5v? --- End quote --- Lead acid is old technology that's declining as lithium becomes cheaper. The existing 12V standard matches up with a 3S pack pretty well. --- End quote --- 3S is a bit on the low side and 4S a bit on the high side, but both is in the ball park |
| NiHaoMike:
4S is too much for devices that expect a well regulated 12V. But it does work nicely for "12V" devices designed with unregulated wall warts in mind, e.g. a lot of home network hardware. |
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