Alright, I'm having an absolute headbanger of a problem. After upgrading to higher frequency RAM, I'm no longer getting any signal to my monitor. I've done all the normal troubleshooting things. I've checked that the RAM was seated properly. I've reinstalled the old RAM (still nothing which threw up the WTF flag). I powered down completely and cleared CMOS. Tested each DIMM individually in every slot (both old and new). Popped out CMOS battery and left it out for as long as 30 minutes. Cleared CMOS again, and tested each DIMM individually again. Still nothing. Still the same POST code.