I have an HP h81020. It has a horrible mother board in it and I would like to upgrade it so I can upgrade the GPU. Even though my old MoBo (carmel 2) has a pci express 2.0 slot other people say it will not take newer graphic cards for some reason. The board is a micro atx lga 1155 slot. My processor is an i7 2600s. Would I have any problems just buying a micro atx lga 1155 motherboard and and putting it in my current case? The case itself seems to have a good amount of room, but not sure if HP cases are special made or not?