First post, by revolstar
So, I bought the HP RP5800 TFF PC with the intention of turning it into a WinXP retro gaming machine. The WinXP installation went well, but things went south after I connected a low profile Radeon HD 7570 PCI-E to the onboard PCI-E x16 slot. The GPU fan is spinning, so I guess the card does receive power from the MoBo, but I can't get it do display anything. And WinXP doesn't detect it - it's missing in Device Manager. What is more, I can't find any BIOS options that would allow me to toggle between the onboard VGA and the dedicated GPU. Any ideas?