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Upgrading my psu on my computer

Last response: in Components
February 16, 2010 1:33:23 AM

I am updating the power supply on my computer from a ultra x3 850 watt to a ultra x4 1050 watt and i tested the power supply and the power supply reads at 4.5 on my 8pin 5 volt rail that i use for my computer and was wandering what the 4.5 was below what it should be.the power goes from 4.7 to 4.5 when i run the test and the tester is beeping so i was wandering if the power supply should be returned or if it is ok.

More about : upgrading psu computer

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a b ) Power supply
February 16, 2010 1:54:50 AM

SInce it's out of specs, you should return it.
a c 248 ) Power supply
February 16, 2010 1:59:30 AM

According to Version 2.2 of the atx standard, the tolerance limits for a +5 volt rail is a minimum of +4.750 volts and a maximum of +5.250 volts.

I checked several references. The X4 was supposed to be an improvement over the X3 but there's still a bit of a minor problem with voltage regulation and sub par Power Factor Correction (PFC). Technical reviews were mixed.

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February 16, 2010 3:44:49 AM

thank you all for your quick response i will return for a new unit
February 23, 2010 1:59:08 AM

Best answer selected by PC BUILDER.