Ok, so I started testing my RAM with HCI Memtest Deluxe (the bootable DOS version) before posting this thread so I ended up testing it for 32 hours w/o the XMP profile enabled and the "Performance Enhance" setting set to "Standard".
I just finished testing my RAM with the newest version of Memtest86+. The XMP profile was enabled and "Performance Enhance" was set to "Extreme". I let Memtest86+ run for 30 hours, 30 minutes. 13 passes, 0 errors.
I guess my 16GB DDR3-1600 HyperX RAM is good.
Just have to test it in Windows now with the Windows version of HCI Memtest Deluxe.