Want to replace 300W power supply for 500W

[jygarneau]

I want to replace the power supply from 300W to 500W for new graphic video card.

Where can I found compatible power supply?

My Power Supply now is D11-300N1A.

[old_geekster]

@jygarneau , welcome to the forum.

You can use any standard ATX power supply unit (PSU).  I like Corsair products.  You should measure the existing PSU and compare those measurements to the one that you choose to assure that it will fit into the space provided.  I suggest that you consider buying a modular PSU.  They work best in smaller cases.  You only have to use the cables that are absolutely necessary which allows for better airflow.  Make certain that it has any necessary 6 or 8-pin supplemental power connectors.

Before you buy a new video card you should check to see if the motherboard has a standard/Legacy BIOS or UEFI.  HP didn't begin using UEFI until mid-October, 2012.  Your computer was released in October, 2012.  Newer video cards require UEFI in the motherboard.

Please click the Thumbs up + button if I have helped you and click Accept as Solution if your problem is solved.

[jygarneau]

I received new PSU EVGA 500BR and replace my old. Put video Radeon R9-270 on the slot and boot. The were unable to boot. Shutdown and restart. Many on-off made by computer and after boot successfully. Play Doom many hours. Next day, open computer and work well. In afternoon blank screen, so shutting down power. Never restart. Replace my old PSU And remove Radeon, but nothing boot and no screen. Remove RAM and reboot, 5 beeps, memory error. Insert old RAM, now 6 beeps, video graphics. Bad news!

[old_geekster]

Thank you for the additional information, @jygarneau!

This is bad news!

I suggest that you install all of the original components and run the UEFI Diagnostics.  This can be run without booting to Windows.  Let me know what happens.