Jonwin's computer, which I built for myself couple year back died. He took it to Best Buy and was told it was the MB and maybe the processor and they didn't do anything else. We now have support for up to 4 computers with nothing to show for it. I knew he should have gone to Microcenter though it is all the way across town. They would have check it out and told him what was wrong without needing a protection plan.
Since I don't know if the video card was shorted when the MB went, the new one should have decent on board video that with 4 to 6 gigs of memory can handle Civ5. Case and power supply are the nice ones I got last time I asked for suggestion.