A:AnswerIt's technically compatible, however you motherboard is pcie 3.0, so you will never get the full power from the gpu, also the 2700x will likely be a bottleneck as well depend on the specific game or use case (like locally run ai)
A:AnswerYou can technically use it, but you should still 100% upgrade to make it worth. Your current setup is pcie 3.0. If you want to stick with amd you should upgrade to atleast a 3700x min and am4 (pcie 4.0) motherboard.
You and get a 5600x and B550 for under $300 total before tax
A:AnswerThis is the motherboard i isdd for my girlfriend's build. It's pcie 4.0. So as long as you have a decent cpu, you should be able yo get the max use of of it
A:AnswerCompatibility between CPUs and GPUs is (almost) never a thing you need to worry about. So long as you have the PCIe slot to mount this in, yes they are compatible.
A:AnswerYou'd have to ask HP. I can't find any useful information on their web page about that model. You'd need to know whether the case can accept a full-height card and whether the power supply has at least one available PCIe power cable.