Pc posting inconsistently

[Withenex]

My pc can post, it's just that sometimes when i turn it on the fans rev up then rev back down over and over again and it never posts. I have to press and hold the power button to get it to stop. Sometimes it takes multiple rounds of this process to actually get the system to post. A few times it has taken more than 20 minutes to post like this. When the system finally does post, my desktop icons are messed up and my system time is wrong. If i go into the bios after one of these fits it says my bios has been reset. 

[Withenex]

I've already replaced the cmos battery with a new one, updated the bios, and checked all of my connections. My pc also powers on some times so it's probably not the psu I think. I'm using a known good set of ram and I've tried running it at 2133mhz for compatibility reasons (it's a 3200mhz kit)