Computer power supply Archives

Q&A: I need to replace the power supply in my PC. Which brand do you recommend?

Posted on July 15, 2019

Question from Michael: The power supply in my computer has gone bad and I need to replace it.

I looked on Amazon and a couple of other sites and there are so many brands to choose from.

Which is the best brand of power supply for someone on a limited budget (hopefully less than $100)?

Rick’s answer: [Read more…]

Q&A: What is red switch on back of my PC labeled 120V/240V for?

Posted on May 25, 2013

Question from Amir H.: I just bought a new computer and on the back is a switch labeled 120V/240V. What is this switch used for and do I need to change it? Thank you.

Rick’s answer: Hi Amir. The switch you’re asking about is used to select the proper input voltage for the computer’s power supply unit (PSU).

Here in North America the power that comes out of a standard wall outlet is roughly 120 volts AC, but in many places around the world it is twice that (approximately 240 volts AC). The red switch on the back of the PSU needs to be set to match the output voltage of the wall outlets where you happen to live. [Read more…]