What is the max rating of this PSU ? I am unable to understand.......
- Thread starter Tech_15
- Start date
Solution
ingtar33
Glorious
- Dec 17, 2012
- 9,017
- 198
- 45,840
450W
and don't use "old psu's" laying around until you thurougly test them first with something like this https://www.newegg.com/Product/Product.aspx?Item=N82E16899705003
a bad psu can kill pretty much everything it's connected to, so you need to be cautious with them unless you can afford to blow your eq up.
and don't use "old psu's" laying around until you thurougly test them first with something like this https://www.newegg.com/Product/Product.aspx?Item=N82E16899705003
a bad psu can kill pretty much everything it's connected to, so you need to be cautious with them unless you can afford to blow your eq up.
ingtar33
Glorious
- Dec 17, 2012
- 9,017
- 198
- 45,840
correction, misread the label, that's a 230W psu max. It reads strange on the label, glad I came back and saw my error to correct myself.
19A means it only does 228W, the Label claims 240W, it isn't a 240W PSU though.
That's like a 55% efficient unit, terrible. Pure junk.
nukemaster
Titan
- Nov 23, 2004
- 19,626
- 6
- 74,965
I would NOT recommend that power supply for anything that needs more than maybe 200-250 watts.
While the power supply may be able to put out 450 watts, It is not distributed in a way that is useful to most modern systems.
Older systems used to lean more on the lower voltage rails(5 volts and 3.3 volts). Newer systems use the 12 volt rail for almost anything.
Devices like CPUs and GPUs used to use these lower rails, but as power requirements went up started to draw from the 12 volt rail(smaller wires for the same wattage).
For this reason an older power supply that may deliver 200+ watts at 5 volts, is not suitable for a new system that wants more 12 volt current. This is not to say that new systems do not use the 5 volt and 3.3 volt lines because they do, but not nearly as much.
Newer power supplies also have a different design that allows them to generate a very large amount of power on a 12 volt rail and use switching dc-dc converters to get 5 and 3.3 volts. This allows a decent level of compatibility with older hardware while still having the required 12 volt power for modern systems. This design also means that drawing lots of 5(USB uses 5 volts) or 3.3 volts on a newer power supply will reduce the available 12 volt power.
Bottom line, I do NOT recommend using that power supply. Between the age and old design you are just asking for trouble.
EDIT
Not quiet.
It is just an old design. Unlike new units with most of the power available on the 12 volt rail.
Please do not confuse output ratings with efficiency.
Efficiency is the ratio of input required to generate a certain output(wasted). A 450 watt power supply will put out 450 watts even if the efficiency was 20%(imagine the heatsink that sucker would need). All PC Power supplies from the last 30 or more years are sold based on output wattage(while this unit lists an input current, It is generic at best).
While the power supply may be able to put out 450 watts, It is not distributed in a way that is useful to most modern systems.
Older systems used to lean more on the lower voltage rails(5 volts and 3.3 volts). Newer systems use the 12 volt rail for almost anything.
Devices like CPUs and GPUs used to use these lower rails, but as power requirements went up started to draw from the 12 volt rail(smaller wires for the same wattage).
For this reason an older power supply that may deliver 200+ watts at 5 volts, is not suitable for a new system that wants more 12 volt current. This is not to say that new systems do not use the 5 volt and 3.3 volt lines because they do, but not nearly as much.
Newer power supplies also have a different design that allows them to generate a very large amount of power on a 12 volt rail and use switching dc-dc converters to get 5 and 3.3 volts. This allows a decent level of compatibility with older hardware while still having the required 12 volt power for modern systems. This design also means that drawing lots of 5(USB uses 5 volts) or 3.3 volts on a newer power supply will reduce the available 12 volt power.
Bottom line, I do NOT recommend using that power supply. Between the age and old design you are just asking for trouble.
EDIT
Not quiet.
It is just an old design. Unlike new units with most of the power available on the 12 volt rail.
Please do not confuse output ratings with efficiency.
Efficiency is the ratio of input required to generate a certain output(wasted). A 450 watt power supply will put out 450 watts even if the efficiency was 20%(imagine the heatsink that sucker would need). All PC Power supplies from the last 30 or more years are sold based on output wattage(while this unit lists an input current, It is generic at best).
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