Spoken from someone who has experience with this and spent some time looking at all the different ways to mount it.
1: You don't need the X-Bracket if you have the 2011 Screws.
2: I you want to Mount it the correct orientation with Corsair reading Corsair without it being slanted on the side, you might need to do the following:
- Take a pair of pliers and bend all 4 tabs upwards just a little not too much, if your worried about scratching the black paint on the tabs, take a cloth and cover where your pliers will be bending.
- Loosen up all 4x LGA2011 screws on the LGA2011 bracket, as in have them screwed in a bit but only half or maybe a quarter of the way in, then place the water/pump block on the screws (it might be tight and you might have to force it down a little with some force but it will go in without too much trouble), and start screwing in the thumb screws in to tighten up the 4 screws. Do this evenly by doing say top left then bottom right, then bottom left top right.
3. You can mount it with almost ZERO issues if you mount it on the side with the waterblock reading Corsair reading upwards instead of horizontally.
Number 2 worked for me and that's how I got mine installed. It's tight, very tight but it works.