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Old 26th April 2009, 04:03 PM   #1
SashaV is offline SashaV  Canada
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Default Linear regulated PSU for PC ~ 300W

Is anyone aware of any PSU kits that could be used for the purpose of powering up PC?
What I found so far is stuff that provides 5/12V but up to 1A, and it does not seem to be sufficient.
Can for example some amplifier PSU kits be adapted for such purpose?
I would not like to get involved in making PCB from some schematics, I would rather use some tried PSU kits and such if there is such a thing.
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Old 26th April 2009, 10:31 PM   #2
Atilla is offline Atilla  Norway
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There was a thread in the PSU section about that a few weeks back. You should check it out.

Basically - no. It's annoying, bulky, expensive and in the end of the day has no benefits.

Why do you want that for?
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Old 27th April 2009, 02:01 AM   #3
SashaV is offline SashaV  Canada
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I want to address dirty switching PSU so that sound card in PCI slot outputs digital signal on its SPDIF with less jitter.
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Old 27th April 2009, 02:45 PM   #4
h_a is offline h_a  Europe
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Buying a better SMPS psu for your pc will be way cheaper than a linear 300W psu. Or going for a semipro external soundcard.

Only even more expensive psu-solution that comes to my mind would be a 300W shunt reg, hehe. You don't want that

Have fun, Hannes
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Old 27th April 2009, 07:29 PM   #5
SashaV is offline SashaV  Canada
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OK, what about keeping switching PSU and adding some additional regulation and filtering just before going into the motherboard?
Does it make any sense?
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Old 28th April 2009, 01:27 AM   #6
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QUOTE]OK, what about keeping switching PSU and adding some additional regulation and filtering just before going into the motherboard? Does it make any sense?[/QUOTE]

Makes a ton of sense. I've asked this before, I'll ask again. For folks using a computer as a source component, why is it different from any other source? For an upgrade, isn't one of the first things you go after is to provide clean power?
Ignore that it is a SMPS and enjoy the large benefits of simple mods.
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Old 28th April 2009, 02:23 AM   #7
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Quote:
Originally posted by SashaV
OK, what about keeping switching PSU and adding some additional regulation and filtering just before going into the motherboard?
Does it make any sense?
I don't think this would accomplish much. For instance, there is a DC-DC converter on the motherboard which converts 12V to a little over 1V for the CPU core. Same thing on video cards. Computers are, well... digital after all.

Your best bet is probably a USB or firewire device.
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Old 28th April 2009, 02:31 AM   #8
SashaV is offline SashaV  Canada
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Quote:
Originally posted by compressit
QUOTE]OK, what about keeping switching PSU and adding some additional regulation and filtering just before going into the motherboard? Does it make any sense?

Makes a ton of sense. I've asked this before, I'll ask again. For folks using a computer as a source component, why is it different from any other source? For an upgrade, isn't one of the first things you go after is to provide clean power?
Ignore that it is a SMPS and enjoy the large benefits of simple mods.
OK, so where do I find specific info on simple mods, any digrams, PCBs, assembled boards, etc.?
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Old 28th April 2009, 07:38 AM   #9
h_a is offline h_a  Europe
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Quote:
OK, what about keeping switching PSU and adding some additional regulation and filtering just before going into the motherboard?
That's already included in a high-quality PSU.

It seems more rewarding to me to go for a external soundcard. They suffer the least from such problems.

Have fun, Hannes
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Old 28th April 2009, 07:42 AM   #10
Bakmeel is offline Bakmeel  Netherlands
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Quote:
Originally posted by compressit
Quote:
OK, what about keeping switching PSU and adding some additional regulation and filtering just before going into the motherboard? Does it make any sense?
Makes a ton of sense. I've asked this before, I'll ask again. For folks using a computer as a source component, why is it different from any other source? For an upgrade, isn't one of the first things you go after is to provide clean power?
Ignore that it is a SMPS and enjoy the large benefits of simple mods.
Well, actually it doesn't make sense at all. The first problem is dissipation. With the currents consumed in PC's, linear regulation will easily add up to several counts of watts dissipation, even if you use post regulation.
Second problem is you don't resolve anything because the equipment inside the PC generates sufficient radiated and conducted emissions that a clean supply line will quickly turn just as "dirty" as all the others.
Third is size. You will *never* be able to fit all your transformers, regulators, capacitors and heatsinks in a reasonably sized box, to make any sense at all given the average size of a PC. You will go back to the Enigma-size computers. Let alone trying to fit it inside the PC box.

Linear Computer PSU: it's been tried before. Forget it.
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