Fastened to the mobo? its a scythe ,yes 1366 socket, had a bit of a squeeze getting it in..took a while.
it is a Scythe SCSMZ-2000 92mm Sleeve
i put the little connectors on the side,and it went together and looked like it fastened just as the intel did...But the way it was positioned,it was super hard to press the pins down cuz they were way under the fins..PAIN in the ARSE sweating...frustrated,,
at the same time i installed a 2tb seagate cuda by way of sata and all the connections got real cramped....
being such a cinic,im already looking for my msy mobo warranty..im so mad i could punch my cat... grrr
I had a Ninja with a backplate retention system and the pressure on the socket was so much that my mobo wouldn't post.
But yeah clear cmos, make sure the fan is connected into the cpu fan header.
Some mobos won't won't post unless the cpu fan header is occupied.