ahhhh!! so the fault is in the cpu, pick a 2500k.
See what us support says , maybe I've not understand as well :
You just have to insert them carefully. There is only 1 way to install them, so figure that out, then insert it. The CPU should fall right on, you should not push, move, or anything after it is on the pins. If you need to reseat it, you need to pull it off then try again.
For the two memory kits, you can try it, but we can not guarantee it since we did not test them together at factory.