The correct answer is that you should call Intel or look at the lga1155 and 1150 specs. The question you would need to know are what the actual differences are. The snarky responses about the differences that you see (one has 1150 pins, the other 1155,etc) ate worthless. For example, Google whether you can put a socket 771 xeon in a socket 775 board. You get a mile and half of text from arrogant so called experts saying that its impossible because one has 775 pins and one has 771 and that the ate completely different. Some slightly more knowledgeable trolls mention the lack of bios support.
It turns out, it can and has been done. The sockets are almost identical. There are a couple of pads different,which is fixed with some could and tape, or a tiny flexible PCB, and the key notches need to be filed down. The bios support sometimes can be an issue, but often is fine. In the cases where it is an issue, the procedure to patch a bios for newer CPUs was perfected years ago and is in most cases trivial these days.
My point is, the trolls that ridicule anyone asking a question often know less that the people who asked. Moreover, they stifle the spirit of creativity and sharing that makes hacking about with hardware interesting.
That being said, there is a serious chance if damage here. I don't have the pinouts of the two sockets handy, but one thing that makes me very concerned is the big new feature of the Haswel architecture. Haswel moves the regulator on die. The implication is that socket 1155 for ivy/Sandy bridge has a large number of inputs for regulated voltage supplying the processors cores power. 1150 however is made for haswel. As such it will need a large number of inputs to supply the core as well but they will be unregulated. They could even be 12v strait off the power connector on the motherboard. If that is the case, then it may well be the case that 12v was supplied directly to the CPU which is likely to have destroyed it. That's why I suggest calling Intel or consulting the socket 1150 design documentation. It may give you a hint at how its setup and whether there is any protection. For example, a socket 775 motherboard must sequence its power rails in a certain order, and cut power to the CPU in the case of a fault or overheat condition.Your hope is that the motherboard would be aware that something was very wrong and not apply those voltages. In fact, you biggest hope would be that the CPU was not even seated against the pins in the socket. This is quite possible as Intel usually keys the sockets to prevent exactly the misshap you experienced. You should inspect the socket and CPU for physical damage caused by forcing things to fit.
I understand this is an old thread, but I answering because I feel that inadequate technical detail was given and even though the original poster has long ago solved his probke one way or another, this may be of use to others. (So all the trolls complaining about resurrecting an old thread should simply move along,. In fact one asks why they even bothered to read this)
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