The AMD Radeon HD 7770 graphics card that came with the system is going bad, so I thought rather than just replacing it with a new one I would upgrade to an R9 270X from XFX. The 600W power supply that came on the PC can handle it, and the 2nd 6-pin PCIe connector is there (the 7770 needed 1, the R9 270X needs 2). After pulling the old card and installing the new one, however, no joy.
The fans spin up on the R9 270X, the power for which apparently comes from the PCIe slot (according to XFX), but the monitor does not see any signal. I tried both DVI and HDMI connections. Same thing, no signal. Forcing the monitor to scan has it finding no connection. When I unplug the DVI or HDMI cable the monitor notes the cable is unplugged, however. In addition, the beeps that should signal POST on the card when you power on the PC don't occur, so it is as if the system does not see the card as present.
I don't think the card is DOA, so I am guessing there might be some BIOS setting or update required. Does anyone know if the R-Series AMD GPUs are supported on the h9-1185 Phoenix boxes? Has anyone successfully installed one on any HP desktop?
Thanks in advance.