The problem is that your new video card requires UEFI in the motherboard instead of a Legacy/standard BIOS. HP didn't begin using UEFI until mid-October, 2012. The BIOS can't be upgraded to UEFI. Your best option is to choose a manufacturer and contact their Tech Support for help with choosing the best card for your system.
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Intelligence is God given. Wisdom is the sum of our mistakes!!
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