My condolences my friend, I had the same issue in the past, and it is truly a horrible hassle.
First off, I went to Gigabyte's Memory compatibility list for your motherboard, here
, and upon extensive searching, your memory kit was not listed, which may be the reason that you're experiencing this issue. An odd discovery, but not an end-all-be-all answer.
The specifications for your motherboard do
state that it supports 1866 MHz memory modules, so theoretically, there should be no issues.
The next step is to run MemTest86, download it from PassMark MemTest86 - Memory Diagnostic Tool
You will need to create a bootable USB with the .iso file you downloaded. For this, I like to use Rufus - Create bootable USB drives the easy way
. Open the program, and select your USB drive. Browse for the .iso, and follow the prompts.
Shut down your machine, and make sure that your computer has USB drives set as the priority boot option. TO do this, enter your computer's UEFI/BIOS by starting your PC, and then pressing either F8, F2, F12, the Del key repetitively. Navigate to the "boot" tab, and make the first option your USB drive.
Run this for at least 8 passes (several hours - best to run overnight)
. If even one error shows up within those passes, you have a faulty kit of RAM; conduct an RMA with your supplier (retail store or warehouse from which you purchased your kit), or with Crucial themselves.
Post back with an update :D