Ok, this is embarrassing but hopefully it will save someone else. When you clear CMOS don't do what I did: Dropped the jumper and couldn't find it, went to get a new one, didn't pay attention and put it on the bottom right fan header. If only I had noticed it before i turned the power on... POOF!

Fortunately everything seems fine and no apparent damage except for a burnt fan header MOSFET and possibly no working fan headers. Good thing I use a Sunbeam fan controller Should I be worried that something else might have taken a hit?

Anyway... the reason I cleared CMOS was because my system won't post on reboot after installing 4x2GB G.Skill PC8800. It gives the "Overclocking failed" message even at stock settings but boots fine after entering BIOS. Any ideas on why this is?