Sorry for such a late update, things have been busy. After entertaining the possibility of overheating I went ahead and just opened up my tower. I did a thorough cleaning of all the dust I could manage to air blast away, especially the dust which had built up on my fans. Miraculously enough, it did the trick. My computer doesn't crash during matches anymore! Thank you all so much for helping me out with this. 0AD has such a wonderful and bright team. This is seriously one of the best RTSG's I've ever played, and I can't wait to see what else is in store for it.