Could use some help if possible

[Xtreme Gamer]

So, after about 2 maybe 2.5 years, my memory works fine when all 4 slots are occupied. Now, for the past couple of days, slots 2-4 refuse to function. No bios flashing had ever occured. And no physical damage had occured as far as I can see atm. I had already requested an rma for the board, but I wanted to know what you guys that it could be. They said that it can't be the ram modules because they all work. They also said that the only 2 things they can think of as the possible reason is memory controller in the cpu or something about the motherboard itself. So what do you guys think? What do you think I should do? I really am curious for your responses.

 

Thanks for any/all feedback!!!!

[knight_40k]

Switch the ram in working slots with the non working, that will tell you if its the ram.