Hardware wise you should be good, xp was supported on lga 1155 and the 900 series gpus. Drivers, specifically GPU drivers, may be a little weird since they didn't really spend as much time validating them on older OS's since windows 7, 8, and 8.1 were a thing and people had largely made the move to windows 7 and up by then. Windows XP only really supports two cores, it'll see more but it won't necessarily address them, 4 cores may be a bit of a waste but it won't cause any problems. It's also new enough that you could have it do double duty as a windows 7 gamer. It's not new territory, so chances are if you have a problem, someone else has also had it and there should be a fix. All that being said, you've got the hardware so set it up and have fun!