Odd Issue with ASUS P5K Deluxe and e4300

[MYSTic Jedi]

I used to have my PC (with an ASUS P5K Deluxe) and Intel e4300 overclocked to a significant and stable 2.8 GHz (up from the stock 1.8 GHz). I had a couple fans go out and thus lowered it back down to stock till I could fix that. I now can not seem to overclock at all now. And not just that, whenever I completely shut down the computer (and when it shuts off after I set the BIOS options) It will not Post at all. Nothing on the screen, none of the keyboard lights flash as usual when restarting, just nothing. I have found out that if I unplug it and physically remove a stick of RAM (G. Skill DDR2 800 2x1024 MB) and put it back in, it will start up normally. This is both when the I turn the computer completely off (such as a power outage) or when I try changing anything in my BIOS (version 9.02) that requires the power to shut off. Any help would be appreciated! (And if this should belong in the Motherboards forum, Admins please move it, but my main goal is to overclock again. ) Thanks!