I've all of the sudden been having problems with my RAM in Ubuntu. I'm using two GSkill 2GB sticks. In post it reads the memory at 4GB, but when I look through my system information in Ubuntu, it's only reading it as 2.5GB. Is there some sort of configuration I'm missing? or a patch of some sort for this issue? I've contacted Gigabyte (which is my motherboard) about this, and they said since it's coming up in post as 4GB, there's nothing they can do to help me. Any help or insight would be appreciated.