When I look at the QVL for supported RAM for a Haswell-E CPU and your motherboard, I am not able to find your RAM stick anywhere under compatibility for 2400MHz
A slower model of the same RAM is listed in the 2133MHz section, though, but that doesn't guarentee compatibility for the 2400MHz model you have.
According to
Kingston, the RAM you have are 2400 MHz only. Not 2133 MHz capable of 2400MHz
Since
your CPU supports a maximum memory frequency of 2133MHz without memory overclocking, this could be the reason for your problems.
Sometimes RAM downclocks itself, but often the RAM has a lower base frequency of 2133MHz for example, with a higher XMP frequency. Your RAM is 2400MHz only, as a baseline at least - I would say that it should be able to run at slower speeds.
You have a Z-series chipset, which has more options and settings available for RAM, but I suspect that this RAM module you have bought, prevents you from actually getting into BIOS in the first place
This is the potential problem, as I see it. I might be wrong, but it could certainly also be the actual reason for you problems - it appears to be a compatibility issue.
Your friend probably has a different CPU with higher native support for memory frequency
Hopefully someone else is able to confirm or rule out my suspicion