Confirmed CPU Release Dates.
These will be 1155 Pin CPUs.
Existing I3, I5, I7 socket 1156 Pin Motherboards will NOT be compatible.
Historical Note: [This is Not the first time Intel has done this]
Socket 423, also called PGA423, was a Pin Grid Array (PGA) socket introduced together with Pentium 4 microprocessor family in November 2000.
The socket supported Pentium 4 CPUs and was replaced with socket 478 just in 9 months after its introduction.