Quote:
Originally Posted by swaaye
My bro has a Dell P4 2.6 that shipped with a R9700. It only has a 250W PSU. I thought that was rather odd and pathetic since a 9700 retail says to stick with 300W+ for the PSU. But, it has worked fine for years. I dropped a X800XL in that machine for him a few months back and it seems fine. I'm sure it's at the edge though. I think that the OEM PSUs are of high enough quality to handle a bit more than most of the horrid crap aftermarket PSUs out there.
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Actually, you would be surprised. It is a rare event for me to open a "Major Brand" computer, and see a power supply that is even 300 watts. I did work about an hour ago on a Gateway (1 year old) that had a P4 2.8 GHz processor, and a 160 watt power supply.
I seriously believe that they engineer them to fail. Since 2000, computers have decreased drastically in the quality of power supplies and cases. Most new computers in the last 3 years seem to be lucky if they last more then 2 years without serious problems. And of course, if they fail after the first year (when the warranty expires), that is fine with the makers. It means you get to go out and buy a new computer.
One trick a lot of companies are doing is by doing a "shortcut" with the 5 volt rail. If you look closely, they do not give a listing of +5 volts. This is because what they do is run a 5 volt negative, which in theory "pulls" 5 volts instead of "pushing" 5 volts through a traditional +5/-5 system.
However, the down side is that when that "5 volt pull" goes bad, it sucks 12 volts straight through the motherboard (and other components). Standard power supplies monitor the 5 volt rail, and will shut down if it goes bad.
Myself, I would never use a "stock" power supply that comes with today's computers. They are grossly underpowered, and of a questionable design. Their only advantage for the companies is that they are just good enough to make it through the warranty period. To me, anybody selling new computers with 200 watt supplies should be shot (I do not care what quality, it will still fail sooner then a supply of the proper voltage). But they do it all the time.