Welcome to the HP community and thanks for posting your question here. A very good day to you! I read the post about requiring information about graphics card upgrade. I will be delighted to assist you here.
You’ve done an excellent job on diagnosing the issue from your end. Superb effort and spectacular analysis of the issue. Kudos to you on that score. We greatly value your relationship with HP.
You are a valued HP customer and we appreciate you greatly for doing business with HP. I take it as a privilege to share this platform with you.
For better clarity and to assist you better, I would require more information regarding this:
Have you checked the product specifications of the computer and the cards that you want to replace?
Going by the product specifications of the computer’s motherboard, on paper, many Nvidia and AMD Radeon Graphics card from 2015 should be compatible.
But you need to upgrade to a higher capacity power supply to match the graphics card power requirements as it needs to power that card.
The power connector of your Motherboard is a 24 pin connector.
However, there are a few factors that need to be kept in mind.
Form Factor of the GPU to be housed in the Tower.
The type of Power Supply required.
The connectors of the power supply
The PCIE slot.
You could actually check all the right boxes relating to these for the Form Factor, PCIE slot and required RAM. Your computer meets all the requirements.
However, please check the power supply connector type should match the power connector of the graphic cards that you plan to upgrade. That is paramount. If it does then the GPU should work with your computer.
Bios of the computer comes into play. It should be updated to the latest bios version to support these graphics cards.
So finally, many display cards should be compatible with the computer.
Please note that HP does not recommend upgrading either the operating system or the computer’s hardware as the components that were initially installed with the unit are certified byHP for optimal performance. However, as you are very technically inclined, I would still request you to consult a local technician like Best Buy or Staples before proceeding to upgrade the unit.
So please contact a local Best Buy or staples technician and perform the upgrade so that there are no compatibility issues with the GPU upgrade for your computer and everything works smoothly.