I have successfully installed kali 2016.2 64 bit with encrypted LVM on my HDD (A WD caviar 1Tb) but after I reboot it says "Reboot and select proper Boot device - Insert Boot Media in selected Boot device and press a key". I actually had installed the the 32-bit version whitout issues.

My sys specs are:

CPU: Intel i3-6100T,3.2 Ghz,3mb cache,LGA1151,35W
RAM:Ballistix 16Gb(4x4) DDR4-3200 UDIMM 1.35V
GPU:XFX Radeon RX 460 4GB 1220M
Mobo:MSI Z170A-G43 PLUS(Crossfire version)

I already know that the processor supports 64-bit, this seems like a grub bootloader issue, any help?