Jeff: >From photos of several of these PSUs (both 360 and 400 watt versions) for sale on eBay, it seems pretty clear to me that these figures are output wattage. From my rough calculations based on input figures on the same PSUs, it would seem that the input wattage is between 700-800 watts.
Rob J. On Tuesday, December 11, 2012 11:41:16 AM UTC-5, [email protected] wrote: > > > > On Monday, December 10, 2012 10:14:08 PM UTC-6, Valter Viglietti wrote: >> >> >> > Speaking of which, my MDD has the 360 watt PS. I have seen that there >> are >> > 400 watt units also for the MDD. Any idea why the different versions? >> Is >> > the 400 watt unit just a later version, or what? >> AFAIK, quite the contrary: according to MacTracker, first generation MDDs >> had the 400W PS, subsequent versions (FW 800 and 2003) had the 360W. >> Perhaps the design became more power-efficient; I don't know if the two >> PS >> are interchangeable. >> > > Are we sure these are different versions and not just another example of > what happened with, IIRC, the 9500/9600? In that older case, some times > the input wattage of the power supply was listed. Other times the output > wattage of the power supply was listed. Of course, the input wattage was > considerable higher back then. This sent a number of devoted modders > scurrying around hunting for the "higher power" supply, even though both > numbers referred to exactly the same supply; the two numbers were simply > describing different qualities of the same object. > > I notice that 360 is exactly 10% less than 400. 90% efficiency is > perhaps a bit high, but about in the ball park of what one would expect > from a good efficient supply, so I find it believable, although not > certain, that 400W is the input wattage of the MDD supplies and 360W is the > output wattage of the MDD supplies. > > Jeff Walther > > -- You received this message because you are a member of G-Group, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list
