I think the Sapphire R9 290 is incompatible with my motherboard. I have RMA'd twice and the problem continues. I have tested my hard drives, my ram and my psu. There is nothing wrong with them because everything works fine with my HD6850 in. I use Display Driver Uninstaller to remove the drivers then I install the R9 290 turn on the pc and install the drivers, after restart my pc just freezes for 1 second then black screens and beeps and restarts. No BSOD but it gives me an error after it restarts. ntoskrnl.exe+4adb3c. My motherboard is an Asus M5A78L-M/USB3, I have no idea what else the problem could be so it must be the motherboard. I don't just have a spare motherboard lying around to test it but if someone could reassure me that it probably is the motherboard then I will buy a new one.