Solve : Lower PSU?

1.	Solve : Lower PSU?
Answer» Hello, i searched but couldn't FIND the answer to my question so im going to ask it now . What happens when you put a lower psu than what you NEED, i have 2 power supplies a 250v and 185v (i know they are old) but i just want to see if the 185v can support my computer. Im pretty sure i dont use up all the 250v i only have a mATX board with a AMD XP 2800 1 dvd drive ,hard drive and a floppy disk......any help would be appreciatedPut your PCs' specs in the calculator and see what you can get by with..... http://educations.newegg.com/tool/psucalc/index.html i didn't know they had that to bad they dont have my PROCESSOR....thx anywaysAnd I hope you mean watts because I think if your on a 120v circuit thing then something bad might happen.... The same if your on a 220V circuit thing. Try this one http://extreme.outervision.com/psucalculatorlite.jspIf its an older machine it should be okay at least a 300 watt would be okay. It just wont really run right other wise. Quote from: eframan on June 17, 2009, 12:29:27 PM Hello, i searched but couldn't find the answer to my question so im going to ask it now . What happens when you put a lower psu than what you need, i have 2 power supplies a 250v and 185v (i know they are old) To know requires a 3.5 digit multimeter. Then measure each critical voltage with computer at idle and under maximum load (multitasking to all peripherals simultaneously). I assume you meant watts - not volts. Watts says little to nothing that is useful. In fact, a supply rated by one at 350 watts is also rated by another as 500 watts. And neither has lied. Relevant is current for each DC voltage. Each critical voltage will appear on same colored wires. Measure any one of purple, orange, red, and yellow. For example, three voltages could have more than enough power (current or wattage). And the fourth might be undersized – on a supply with higher watts. Worse, you would not know. Normal is for an undersized power supply to still boot a computer. To learn, you need numbers from the meter. Only way to learn if each voltage has enough current: buy a meter. Meters are only sold in stores that limit their CUSTOMERS by IQ - such as Kmart, Sears, Lowes Radio Shack, etc. Best prices will probably be less than $18 in Wal-Mart. Get a meter if your objective is to learn. And then learn more from the few who better know this stuff by posting those numbers. No numbers (no meter) means your responses will be limited to wild speculation. Or just use the link!

Answer»

Hello, i searched but couldn't FIND the answer to my question so im going to ask it now .
What happens when you put a lower psu than what you NEED, i have 2 power supplies a 250v and 185v (i know they are old)
but i just want to see if the 185v can support my computer. Im pretty sure i dont use up all the 250v i only have a mATX board with a AMD XP 2800 1 dvd drive ,hard drive and a floppy disk......any help would be appreciatedPut your PCs' specs in the calculator and see what you can get by with.....

http://educations.newegg.com/tool/psucalc/index.html

i didn't know they had that to bad they dont have my PROCESSOR....thx anywaysAnd I hope you mean watts because I think if your on a 120v circuit thing then something bad might happen.... The same if your on a 220V circuit thing. Try this one
http://extreme.outervision.com/psucalculatorlite.jspIf its an older machine it should be okay at least a 300 watt would be okay. It just wont really run right other wise. Quote from: eframan on June 17, 2009, 12:29:27 PM

Hello, i searched but couldn't find the answer to my question so im going to ask it now .
What happens when you put a lower psu than what you need, i have 2 power supplies a 250v and 185v (i know they are old)

To know requires a 3.5 digit multimeter. Then measure each critical voltage with computer at idle and under maximum load (multitasking to all peripherals simultaneously).

I assume you meant watts - not volts. Watts says little to nothing that is useful. In fact, a supply rated by one at 350 watts is also rated by another as 500 watts. And neither has lied.

Relevant is current for each DC voltage. Each critical voltage will appear on same colored wires. Measure any one of purple, orange, red, and yellow. For example, three voltages could have more than enough power (current or wattage). And the fourth might be undersized – on a supply with higher watts. Worse, you would not know. Normal is for an undersized power supply to still boot a computer. To learn, you need numbers from the meter.

Only way to learn if each voltage has enough current: buy a meter. Meters are only sold in stores that limit their CUSTOMERS by IQ - such as Kmart, Sears, Lowes Radio Shack, etc. Best prices will probably be less than $18 in Wal-Mart. Get a meter if your objective is to learn. And then learn more from the few who better know this stuff by posting those numbers. No numbers (no meter) means your responses will be limited to wild speculation.
Or just use the link!

Solve : Lower PSU?

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