I have 4gb ram only. I don't know why it struggles. With CS6 it takes 1-2 minutes. I was talking about the cs5.lol, saving HD texture 5-10 minutes? You have the same CPU as have I, same amount of RAM (if I am not mistaken 8GB), so why would it take so much longer for you? It takes not even one minute for me to save a HD texture.
But I use paint.net maybe it saves faster(?) But I would wonder.