Hello, so I've had my custom built i5 4690k 3.5ghz, GTX 760, with a Z87-plus motherboard for about 2-3 years now and just recently I've encountered some issues, being that my computer will not boot with 16gb's of ram I had to take out 8gb's for my pc to even boot up and now it runs fine. Can anyone explain to me why this is? Any help is much appreciated.