Hey guys, I bought an XFX RX 480 and power supply to put on an old PC with an AMD Athlon II X2 255 Dual core (which I know will bottleneck, but I'm not worried about that). Basically, the monitor stays without a signal when the computer turns on with the card in. No error beeps or lights appear. I wasn't able to get into the BIOS of my motherboard so I went to Acer to get the latest update from years ago. The update installed in the command prompt but something that showed that didn't show in the instructions was "CMOS checksum destroyed." After the reboot, I come to a screen with an option to press a key to go into the BIOS setup, which does nothing, and a message above that says "CMOS checksum error or CMOS data crushed." I have looked around for fixes but I haven't found any.
So my first concern first is getting into the BIOS, which I can't, so I can check for any problems regarding the 480 and black screen in any PCIe settings. Any ideas?