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#1
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will a cheap PSU (antec) kill P4S800 ?
so to followup - i sent the mb/cpu back, and the technician said he
tested it and it works fine. he said my antex 330 must not have enough power. he is sending it back, and strongly recommends a "P-4 ready" PSU. here are some interesting articles: http://www.directron.com/p4install.html#p4power it says that to be P4-ready, a cpu/mobo needs: 26 Amps at 3.3V, 30 Amps at 5V and 15 Amps at 12V hmmm...i'm looking for a good psu now.. |
#2
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er....
your new antec should be P-4 ready. Isn't there a 4 pin power lead. If there is, did you connect it to the motherboard...in addition to the main power connector? nerdb0t wrote: so to followup - i sent the mb/cpu back, and the technician said he tested it and it works fine. he said my antex 330 must not have enough power. he is sending it back, and strongly recommends a "P-4 ready" PSU. here are some interesting articles: http://www.directron.com/p4install.html#p4power it says that to be P4-ready, a cpu/mobo needs: 26 Amps at 3.3V, 30 Amps at 5V and 15 Amps at 12V hmmm...i'm looking for a good psu now.. |
#3
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Additional info:
http://www4.tomshardware.com/howto/20030609/index.html Randy wrote: er.... your new antec should be P-4 ready. Isn't there a 4 pin power lead. If there is, did you connect it to the motherboard...in addition to the main power connector? nerdb0t wrote: so to followup - i sent the mb/cpu back, and the technician said he tested it and it works fine. he said my antex 330 must not have enough power. he is sending it back, and strongly recommends a "P-4 ready" PSU. here are some interesting articles: http://www.directron.com/p4install.html#p4power it says that to be P4-ready, a cpu/mobo needs: 26 Amps at 3.3V, 30 Amps at 5V and 15 Amps at 12V hmmm...i'm looking for a good psu now.. |
#4
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If the PSU does not have the special 12 volt P4 4-pin power cable and the
motherboard does not have the Asus EZ-Plug (??) adapter, then YES the unit is "underpowering" the motherboard. P4s need the extra 12 volts to power the CPU. Y. "nerdb0t" wrote in message om... so i called customer support for my recent P4S800 w/ P4 3GHz and told them i thought my purchase was DOA. they immediately asked about my powersupply, and i said i have an enermax 300W. they said that PSU is known to kill P4S800's. i said that i bought a new PSU (antec 330W) and they said that antec's are too weak to power up a P4S800 w/ 3GHz, especially if i was using DDR400 memory. they said i need at least 550W if i'm using a "cheap PSU". they told me to send back the system and they will replace it, but that i need to get a new cpu. they only recommended zippy and enlight at 300W, but i could get a generic one if it was over 500W. is this some kind of bogus crap, or do you think my PSU could fry my motherboard by "underpowering" it? (in quotes b/c antec 330W seems like plenty power to me..) |
#5
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thanks randy and yves.
but this is a big "no duh." ;-) of course i plugged in the 12V 4-pin! (see the original post.) the real question is: "what makes a psu _truly_ p4-ready?" and i think the answer has something to do with the _true_ amperage and the safety circuitry in the PSU. it seems as though i have 2 power supplies that don't cut the mustard, even though they have the atx12v 4-pin. the vendor took back my CPU/motherboard and bench tested it - it worked fine with his power supply. he also explained that he has many customers that have had trouble w/ the asus P4S800 and "weak" power supplies. "Yves Leclerc" wrote in message ... If the PSU does not have the special 12 volt P4 4-pin power cable and the motherboard does not have the Asus EZ-Plug (??) adapter, then YES the unit is "underpowering" the motherboard. P4s need the extra 12 volts to power the CPU. Y. |
#6
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"nerdb0t" wrote in message om... so to followup - i sent the mb/cpu back, and the technician said he tested it and it works fine. he said my antex 330 must not have enough power. he is sending it back, and strongly recommends a "P-4 ready" PSU. here are some interesting articles: http://www.directron.com/p4install.html#p4power it says that to be P4-ready, a cpu/mobo needs: 26 Amps at 3.3V, 30 Amps at 5V and 15 Amps at 12V hmmm...i'm looking for a good psu now.. Do the math on that one 418 W now assuming the worst spec supply that's p4 rated then you would need something that is 100% true power.. most arent so that means ANYTHING under 500w = no good Now it wouldnt surprise me if something else (bad drive, too many drives, ect ect) is loading down your system the 330truepower is a great psu |
#7
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Too many people are saying things that either untrue or
quite misleading. First 300 watts is more than enough power for most systems. However many inferior supplies don't even output power as claimed. Furthermore, to sell at sub $80 retail, many supplies are missing essential functions required by all switching supplies even when HP was building them 30 years ago. If a supply was undersized, then a 3.5 digit multimeter would have made that obvious. If 12 volts could not output sufficient current, then the 3.5 digit multimeter would demonstrate the problem - immediately - with numbers. Answers without numbers should be always suspect. If a technician really knew a power supply was undersized, then he could have said which voltage was not outputting enough power. But too many computer repairmen don't even have basic electrical knowledge, don't owns that all so important 3.5 digit multimeter, AND don't even know what those above mentioned power supply functions are. For example, if a power supply is under powered - does not output sufficient voltage - then is the computer damaged? Of course not. If a computer draws too much power, is the power supply damaged? Yes if a power supply demonstrated in tests by Tom's Hardware. But those were classic examples of power supplies missing essential functions. All power supply outputs can even be shorted together AND no properly designed power supply is damaged. In specs listed below, look at the line labeled "Over power protection". Just some simple questions to ask that tech - to discover if he has minimally acceptable computer knowledge. In the meantime, Enermax typically meets your newly learned requirements for properly designed supply. If that tech cannot provide a long list of specs with your new supply, consider it defective by design. Specs required to make a power supply P4 ready. An abbreviated example that must be provided with an acceptable P4 power supply: Specification compliance: ATX 2.03 & ATX12V v1.1 Acoustics noise 25.8dBA typical at 70w, 30cm Short circuit protection on all outputs Over voltage protection Over power protection 100% hi-pot test 100% burn in, high temperature cycled on/off PFC harmonics compliance: EN61000-3-2 + A1 + A2 EMI/RFI compliance: CE, CISPR22 & FCC part 15 class B Safety compliance: VDE, TUV, D, N, S, Fi, UL, C-UL & CB Hold up time, full load: 16ms. typical Efficiency; 100-120VAC and full range: 65% Dielectric withstand, input to frame/ground: 1800VAC, 1sec. Dielectric withstand, input to output: 1800VAC, 1sec. Ripple/noise: 1% MTBF, full load @ 25°C amb.: 100k hrs Meanwhile, ask that tech what happens to a power supply if output voltages are shorted. If he does not say "no damage" or "power supply protects itself", then you know this tech is not qualified. Too many computer techs don't know; will even claim the power supply will fail or blow a fuse. No power supply must damage any computer parts and not computer components must damage any power supply. If the tech knows his stuff, then he measured and reported voltages output by that supply under full load - because that is the first test one does to verify integrity of a power supply. Does it have enough power? There is no reason to guess. It would have been immediately obvious using that meter. No reason to speculate about that power supply. Simple mesurements would have answered the question yes or no without any doubt. nerdb0t wrote: thanks randy and yves. but this is a big "no duh." ;-) of course i plugged in the 12V 4-pin! (see the original post.) the real question is: "what makes a psu _truly_ p4-ready?" and i think the answer has something to do with the _true_ amperage and the safety circuitry in the PSU. it seems as though i have 2 power supplies that don't cut the mustard, even though they have the atx12v 4-pin. the vendor took back my CPU/motherboard and bench tested it - it worked fine with his power supply. he also explained that he has many customers that have had trouble w/ the asus P4S800 and "weak" power supplies. |
#8
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fyi - problem solved.
i got an antec 480W, and it seems to work fine. dont know why the antec 330W was not enough power, but whatever. w_tom wrote in message ... Too many people are saying things that either untrue or quite misleading. First 300 watts is more than enough power for most systems. However many inferior supplies don't even output power as claimed. Furthermore, to sell at sub $80 retail, many supplies are missing essential functions required by all switching supplies even when HP was building them 30 years ago. |
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