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#1
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Power supply
Here's the max specs.
32A@+5v 26A@+12v 1A@-5v 1A@-12v 2.2A@+5vsb Someone correct me if I'm wrong, but doesn't VxA=W? So then the watts would be roughly 100, 160, 312, 5, 12, 11, for a total of 600W. Is this correct? Yet the specs say that the combined max output of +3.3 and +5v is 185Watts, and the PSU is a 350W max ouput. So what do the rail ratings really mean? If you use all 312W of +12v, you only have 38W left to split between the other voltages? Now I have another PSU with these max specs. 40A@+5v 24A@+12v ..5A@-5v 1A@-12v 2A@+5vsb So then the watts would be roughly 100, 200, 288, 2.5, 12, 10, for a total of 612.5W. Now this PSU is rated for 550W, so what's up with it? Which would you want? -- Abit KT7-Raid (KT133) Tbred B core CPU @2400MHz (24x100FSB) My server http://wesnewell.no-ip.com/cpu.php Verizon server http://mysite.verizon.net/res0exft/cpu.htm |
#2
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On Fri, 18 Feb 2005 19:02:07 +0000, Wes Newell wrote:
Here's the max specs. 32A@+5v 26A@+12v 1A@-5v 1A@-12v 2.2A@+5vsb Someone correct me if I'm wrong, but doesn't VxA=W? So then the watts would be roughly 100, 160, 312, 5, 12, 11, for a total of 600W. Is this correct? Yet the specs say that the combined max output of +3.3 and +5v is 185Watts, and the PSU is a 350W max ouput. So what do the rail ratings really mean? They're all ******** - bull****, whatever. You think computer PS manufacture's are stretching the truth with wattage ratings? - you should see the home audio industry, now there's a load of used car salesmen if ever there was! I suspect one should take all these ratings with a grain of salt. They are probably all absolute max ratings, under ideal conditions, when the other rails are not being used! I really think the only way to choose a power supply these days is based on word-of-mouth for reliability. There are probably loads of different power supplies rated from 300-500 watts which put out more or less the same power. Larry Gagnon |
#3
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Indeed. I have a 600W power-supply and it only put out 17amps on the 12v
rail! However it's stable in my setup. Dan |
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