I have a HP Pavilion P7-1235 with all the stock components. Here are the specs. I wanted to replace the PSU and GPU being that I had a 280W PSU and onboard graphics. I ordered a EVGA 500W PSU and a MSI Radeon RX 460. I installed my PSU just fine and it's replaced my old stock one. However, when I install my GPU with the new PSU, whenever I turn on my PC, the case lights and the fans to the CPU, GPU, PSU, and case all turn on but my USB 3.0 ports that I usually use for my mouse and keyboard aren't working. The mouse and keyboard didn't work in any other USB ports either. I already tried clearing my CMOS then booting again but that didn't work. What other solutions do I have? RMA?