"The Aurora R3's BIOS doesn't like GPUs that use a vBIOS based on UEFI (UEFI came after the R3, if I recall). I don't know if the R9 290 has a UEFI BIOS, but you would need a GPU that has a legacy vBIOS in order for it to work. Some GPUs have multiple vBIOS types (both UEFI and Legacy BIOS) to be compatible with older and newer computers."