Is 200W enough?

gplanet

Senior member
Jan 5, 2002
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right now i have a 120-130W PS that runs two hard drives, a CD-RW (scsi), duron, 3 PCI cards, and AGP card....so maybe 200W is fine?
 

splice

Golden Member
Jun 6, 2001
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200W is most likely going to be ok. I have 150W running a 60GB WD HDD, Duron 600, Asus KM133 Motherboard, DVD Drive, Floppy, NIC, and 2 60MM fans
 

Mark R

Diamond Member
Oct 9, 1999
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It should be fine (providing that the PSU is of adequate quality).

I've had no problems running a 1000 MHz Athlon, with Geforce 2 and several HDDs with a 200 W supply - however, the same system wouldn't even power up with a "300W" supply.
 

ILikeSprite

Banned
Oct 14, 2001
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200W?? I wouldn't think so. I fried a PSU by running too much stuff on it. So I ended up replacing it with a 400W. :D
 

Boobers

Senior member
Jun 28, 2001
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Any company that would even make a 200W PSU is cutting corners and the PSU is probably crap. Here's a tip: If a PSU has the words "High Quality" printed on it, it is CRAP.

Look at the specs on the PSU. Add together the wattages for the 3.3v & 5v feeds. They should add up to at least 140 watts. Any less and I'd throw it in the trash.
 

gplanet

Senior member
Jan 5, 2002
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it's a 200W power supply in a Chenbro 1U rackmount server chassis

the PS is a Delta or Zippy
 

IaPuP

Golden Member
Mar 3, 2000
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The trick that used to cause AMD systems to malfunction due to insufficient power is actually the maximum current supply of the +5V or +3.3V rail on the PSU, not the wattage.

You will burn it out if you pull too much wattage and 4 drives may be pushing it a bit, but it will *probably* work fine.

I would wager to say that a 1U server PS would be of a much higher quality than the typical "emachines special" that people end up burning out by plugging in one too many drives.

Check the +3.3v and +5v rails to be sure you can get 12A and 25A respectively. I think that's what I remember hearing as good specs for a stable system.

Eric
 

Boobers

Senior member
Jun 28, 2001
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Remember... Wattage = Voltage X Amperage

So... 3.3v X 12A = 39.6 Watts

Edit: 5.0v X 25A = 125 Watts
(My bad, it was very early in the morning when I posted that, sorry. :D )

That adds up to 165 Watts... That's about right.

I wouldn't believe what you read on the side of a cheap PSU anyway. The best way to find out is to plug it in and see what happens. But, I'd beg, borrow or steal a better PSU first...
 

Mark R

Diamond Member
Oct 9, 1999
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Minor correction:

So... 3.3v X 12A = 39.6 Watts
5.0 V X 25 A = 125 Watts

Total 3.3 + 5V = 165 W