I don't know for sure if it's the power supply I'm using but I am getting under voltage warning on my Raspberry Pi B+ when overclocked and not overclocked (more frequently when overclocked).

I've tried 4 different phone chargers - HTC, Samsung, and 2 off brands, and 3 different USB cables. I've also tried using the Pi without anything plugged into the USB. I am planning on getting a powered USB Hub, because I want to use a wifi dongle along with my Xbox controller.

I just want to know what the consensus is for overclocking a Pi on whether or not it needs a stronger PSU or it's because the USB ports are drawing too much power.

Also, any recommendations for a reliable PSU and powered USB hub?

closed as primarily opinion-based by Milliways, Phil B., user2813274, joan, mpromonet Oct 3 '15 at 11:42

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    You do not often get something for nothing. You overclock to get more speed, that requires more power. Buy an inexpensive meter and measure the voltage at the Pi. – joan Sep 29 '15 at 7:50
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    How much overclocking do you have? – Steve Robillard Sep 29 '15 at 8:55

Phone power supplies are not as reliable as dedicated switching power supplies. You can buy a switching power supply for the rPi for very little money (this one for example). A powered hub might work, but depending on the hub you might get feedback issues. A separate, well spec-ed power supply (at least 1.5A for rPi. 2A for rPi2) is the best way to go.

  • Thank you very much. I wasn't planning on using the powered hub to power the PI, just using it for the USB devices so they wouldn't be drawing more power from the PI. I will invest in a better power supply then. – Siver Sep 29 '15 at 21:47

Phone chargers are chargers of unknown specifications. They are not regulated 5 Volt power supplies. You risk damage to your RPi and lots of frustration. Spend $5 or $6 on fleebay and buy a 5V 3A plug-pack and never need to worry about under-voltage problems again. This has been my experience.

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