New ram won't boot

Hello,
I have a pair of Corsair XMS 8gb in slot 1 and 2. I had a pair of Adata but one was failing memtest so I just got a replacement under warranty. When I put ram into 1 of the 2 remainin ram slots in my Gigabyte Z68 motherboard, it'll boot just fine. If I put ram into the last remaining slot, the computer won't boot. It'll power up for 1 second, make a small chirp and shut off. It will do this over and over. If I remove the ram, it boots. I have tried changing the ram between the 2 new ones I got as well as one of the Corsair XMS I have and it seems like it's fine as long as that ram slot is not being used.

Does this mean the ram slot on my mobo is bad?

I'm not a pro so is there any settings in bios or anything I might try first before I get a new motherboard? UGH it's 13months old and everything was fine! I need 16gb ram and having a small component crap out on you when you're broke sucks.


Sorry i posted in the wrong section the first time around.