If the Apex X has the same spacing as my Apex IX mobo, you might find the tubes on the X62 CPU block (that point out towards the right) cover a memory slot.*
As there are only two memory slots, this is a problem. I’m using two GSkill Trident Z memory modules.*
I just flipped the block upside down on mine (the NZXT logo switched off) and been using the system like that *for 12 months. Do it at your own risk of course.*
I’ve had awesome temps so pretty happy. **
Your ass is grass, smoke it I will!