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RE: P24 current measurements.

Hi Robert,

I checked ALL bios settings carefully. :-( The LAN was still enabled in the BIOS. After I disabled the LAN, playing music still needs 3,00 Amps. So only 0,14 less. No way close to your 2.47 amps.

I also use SRC 145, buffers 48 and also Tiny. But 24/96 because my Lavry Black DA10 can’t go higher than 96. (Dan Lavry wrote a paper somewhere, where he points out that going higher than 96 for playback has no point. Only for recording 24/192 would make sense because of the involved mixing / mastering process thereafter). And I must confess: It’s really, really difficult to hear some difference between 44.1 and 96.

While I was at it, I was curious to know how much extra Amps are needed for other settings.
I use: DDR2 = 2.0 Volt / FSB = + 0,2 Volt, while cMP2 recommends: DDR2 = 1.8 Volt / FSB = – 0,15V . My overvoltage settings need an extra 0,25 amps on the 5 Volt rail. Much more than I expected.

I still puzzles me why an improvement of ‘a lesser important’ (??) 12V line on the P24 still has that nice impact on sound quality. But I’m even more puzzles and heavily surprised by the BIG (!) impact low resistance wires had on sound quality.

Right now I try to figger out what the best strategy would be for improving the 5 Volt in order to get to me too the next level of Sound Quality. I have done yet al the quick and easy improvements which (hardly) need any soldering skills and no knowledge about electronics.
- PSU improvements part 1 = linear PSU on P4.
- PSU improvements part 2 = linear PSU on 12V on P24 (with help of a specific picoPSU model used).
- PSU improvements part 2.5 = low resistance wire between P4 and picoPSU at P24.(requires only some soldering kills)

Now I’m still thinking on how I can do ‘PSU improvements part 3’ (improvement of the 5 Volt supply) with most effect on Sound Quality, but with only some basic soldering skills and almost no knowledge of electronics present.

As always: many thankx for your thoughts, ideas, input and feedback.

Mark

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