I have tried everything from cleaning and resetting the ram to completely rebuilding everything. No matter what I do when I boot the computer up the monitor shows No Signal. I have a gigabyte motherboard with a Sapphire Radeon r7 260x graphics card. I have also checked to make sure all the cables are in running position, and it seems everything is fine, I just bought everything new so there would be no reason as to why something is not working properly. I also have a AMD A8 7600, I don't know if it's just that card isn't compatible with the motherboard or just not a good enough cpu, I just can't figure out. Please respond with a fix or answers as soon as possible.