Rampage II Extreme troubles

So I have had my new rig for about two weeks now and am loving it. There are only two small hiccups, one I am working on concerning the ram, but the other has to do with my mobo, and is getting very annoying. It runs totally fine about 80% of the time, but sometimes, if an OC ever fails, or I change anything inside my box, it won't post. The LCD post display just says Welcome, and then goes to a timer, doesn't even try to post, so it's not like it is failing. I try clearing the cmos, and turning the power off, etc, but none of this works. Then, if I leave it powered off for an hour or so it will boot up just fine without me changing anything that I had done, so obviously nothing was wrong. Does anyone have any idea what could be causing this, it is driving me crazy. I hate not being able to work on my rig out of fear of it not coming back on for a while. I have tried booting with only one stick of ram as well, with no different results, and my clear cmos jumper is in the enabled position. Whenever I use the clear cmos button it won't boot right away, but when it eventually does the cmos is cleared, so I know it's working. Please, any help is very much appreciated and rewarded with rep Thanks a lot everyone.

Edit: Ok, while working on the memory problem I have discovered something bad. My second dimm slot is dead apparently. All of my sticks are detected when used by themselves in the first, but when I try to use two, it still only reads one stick. when I use three it reads two of them, so the only thing I can think of it that the dimm slot is dead. Is there any hope, or do I see an RMA in my future?