When you really want to game... but the HP motherboard uses some sort of custom 6pin power connector, not the standard 24pin atx plug, so you could only use a gpu that
What are the things I need to assemble Intel i5 10th Generation PC? I mean RAM, power supply, motherboard, hard disk, CD drives, etc. - Quora
MACHINIT B75 Motherboard Kit With Core i3 3220 CPU DDR3 2x4=8GB Desktop Memory RAM LGA 1155 Set Ngff M.2 B75 PRO US|Motherboards| - AliExpress