I am running a Gigabyte Z68xp-ud3 motherboard, and recently bought I7-2700K off ebay to upgrade as I have been running an I3.  The i3 runs fine, but when I put in the I7, the board turns on and off repeatedly.  Thinking I might have gotten a bad processor but thought id check on here.  And yes the board is updated to the newest bios revision I could find, F10.  
My computer specs are as follow
Gigabyte Z68xp-ud3 motherboard
Intel I3-2120 processor
Evga 780TI Classified video card
16GB Gskill 1066 memory
Rosewill 950 watt 80 amp power supply
Anything else you need, let me know.  Thanks