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RE: * NEW * Alternative approach to CPU (P4) power supply

cics,

I'm not sure if I understand your recommendation correctly...

Your quote of the MoBo manual clearly states that P4 mainly powers the CPU. Maybe a few other components as well, but it seems as if we currently don't know which and to what extent. Nevertheless, the primary consumer of the current supplied through P4 surely is the CPU. Now if we consider this "dirty" and bundle it up on one line together with HDD, USB etc., we heavily "pollute" power supplied to the CPU, don't we? That cannot really be the target for improving power supply to our cMP system IMHO...

You surely make a very valid point that we should separate PSUs for P24 and P4, so if inmates only want to use ATX supplies, a good idea indeed can be to add a second ATX PSU for P4 while the first one only powers P24 - but why not keep the Granite(s)? Greg/GStew btw has already shown that even improving on these "dirty" supplies has a positive effect on overall system performance.

Many of us already e.g. use separate linear supplies or batteries for P4 and P24 (e.g. powering a picoPSU or supplying directly to P24) and a "dirty" supply for the truly "dirty" consumers like HDD and USB etc. But I find it hard to understand that taking away more or less clean power from P4 and making it one of the "dirty" consumers could be beneficial.

Have you compared 1 x ATX PSU for P4 plus 1 x ATX PSU for P24 plus 1 (or several) x Granite(s) for "dirty" consumer(s) versus 1 x ATX PSU for "dirties" and P4 plus 1 x ATX PSU for P24 and found the latter to be superior?

Thank you,
Robert



Edits: 11/15/09 11/15/09

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