bios doesn't boot

Hi, so my problem is that my pc turns on but the screen stays black after installing a certain 2GB stick. This module is part of the 2x2GB kit that I've had since 2011. It didn't cause any problems until now. Memory banks seem to be ok, I've checked them with 3 different modules, I've also...

So recently I upgraded my GPU from gt 210 to gigabyte low profile gt 1030. I installed the card and installed the drivers. Got blue screen twice but that was due to old drivers and used ddu to solve that. Everything worked fine..played games like watch dogs 1&2 tweaked a few setting all seemed...