To find out the socket type you have, you can do the following:
Download this handy tool: http://www.majorgeeks.com/download4181.html
Its called Everest FREE and will list all of your system's hardware, specs, ect.
Once installed, open and you will see a list of possible choices on the left.
Open 'Motherboard' and click on CPU.
The information your looking for should be found under "CPU Physical Info" and listed as Package type.