Which of these 2 do you reccomend I buy? is the only difference between these 2 are that the xt doesn’t include a cooler and it is only 100mhz higher boot clock? Any other differences? If so seems like a unnoticeable difference, why would anyone by the xt? I can get the xt within $20 of the 3900x, however I am forced to buy a cooler = more money. If I do the 3900, I want to use the stock cooler if I can. If I don't like the temps, then only will I buy an aftermarket cooler. Thanks