What do you mean "hole lineup"? The hole pattern is square for both. 1155 spacing is 75mm. 775 spacing is a little less. By filing out the bracket holes on a 775 heatsink bracket a little (mine seems to have at least the option for a 2-3mm extension) one might be able to change the spacing to 75mm. Just wondering if anyone has attempted it. And especially if there's anything else in the way. And why did I sell off my Dremel tool????