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Power supply question

S

StevenYoo

Diamond Member
Hello,

I have an Antec PSU rated at 450W.

Is it always pulling 450W? Or does it peak at 450 under full load?

I just have concerns with power consumption and leaving the computer on for extended periods of time.

my system (no OC, all stock):
Core 2 Duo E6400
2 x 1024GB OCZ plat
eVGA 7900GT KO (factory OC'd)
74GB Raptor SATA
120GB WD Caviar SATA
(1) 120mm fan
(1) 80mm fan
and a ZALMAN CNPS9500 (fan is on lowest setting on the rheostat)

thanks
 
Originally posted by: StevenYoo
Hello,

I have an Antec PSU rated at 450W.

Is it always pulling 450W? Or does it peak at 450 under full load?

I just have concerns with power consumption and leaving the computer on for extended periods of time.

my system (no OC, all stock):
Core 2 Duo E6400
2 x 1024GB OCZ plat
eVGA 7900GT KO (factory OC'd)
74GB Raptor SATA
120GB WD Caviar SATA
(1) 120mm fan
(1) 80mm fan
and a ZALMAN CNPS9500 (fan is on lowest setting on the rheostat)

thanks
Click to expand...

Usually it means sustained max load. Can peak above that. Not every mfgr lists the same way.
 
Fire, baaaad!!!!

Meat, goooood!!!!

A PSU doesn't draw what it's rated at. A PSU only supplies the power being demanded of it.

When the same build is powered by two different power supplies, the only variable involved is the power supplies efficiency. Some PSU's may draw more AC power than another to produce the same amount of DC power.
 
Originally posted by: cmdrdredd

Usually it means sustained max load. Can peak above that. Not every mfgr lists the same way.
Click to expand...

so, that is to say, under pretty mellow conditions, it's pulling <450W?
 
Originally posted by: jonnyGURU
Fire, baaaad!!!!

Meat, goooood!!!!

A PSU doesn't draw what it's rated at. A PSU only supplies the power being demanded of it.

When the same build is powered by two different power supplies, the only variable involved is the power supplies efficiency. Some PSU's may draw more AC power than another to produce the same amount of DC power.
Click to expand...

got it.

Thanks very much!
 
Originally posted by: StevenYoo
Originally posted by: cmdrdredd

Usually it means sustained max load. Can peak above that. Not every mfgr lists the same way.
Click to expand...

so, that is to say, under pretty mellow conditions, it's pulling <450W?
Click to expand...

Under "mellow" conditions, it's likely pulling < 150W. 😉
 
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