Hello, the story goes like this: I was using 1 stick of 8 GB DDR4 RAM for 3 years, and a month ago I decided to upgrade to 16 gigs, and bought 2x8GB kit, and because I have only 2 slots, decided to sell the one I pulled out of my PC. Well, today, I removed my new kit and installed the old stick to run a stress test and what not because a guy called wanting to buy it. I went to the post office and once I got home and reinstalled the new 2x8 kit, the first slot on the MOBO kind of stopped working... Both sticks work in the 2nd slot, and neither work in the first... I am getting 6 short beeps, which on my Gigabyte GA-H110M-S2 is a "Keyboard Error". After those 6 short beeps, the PC restarts, does nothing, and restarts again and again... I tried all the USB slots and even tried my old PS/2 keyboard, same story, "Keyboard Error", which is funny because I am typing this down on the same keyboard I was getting errors with an hour ago... I tried pulling out CMOS battery and putting it back in- no luck. What is there to be done before I call the first slot dead and cry over my new and unused stick of memory? Thanks in advance <3