I may be mis-remembering my processor form factor history.. but here goes. I put together my existing PC about 18 months ago. At the time the Intel 1156 processor form factor was the new hotness..

The LGA 1156 and 1366 surface-mount hybrid sockets combine the benefits of both an LGA socket and BGA component, and are compliant with the Intel Core i7 processor family. The sockets’ cantilever beam ...

Groomed for 1-mm pitch, 1,156-pin BGA devices, the SG-BGA-6230 socket accommodates a 35 mm x 35 mm package size and operates at bandwidths up to 8 GHz with less than 1 dB of insertion loss. The socket ...