Upgrading my psu on my computer

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.
4 answers Last reply Best Answer
More about upgrading computer
  1. Best answer
    SInce it's out of specs, you should return it.
  2. 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.
  3. thank you all for your quick response i will return for a new unit
  4. Best answer selected by PC BUILDER.
Ask a new question

Read More

Power Supplies Computer Components