I am sorry I don't know what a Carmel board is. The 2nd generation Intel® Core™ processors will work on our "6" series boards (boards that have H61, B65, Q65, Q67, H67, P67 and the Z68 chipsets). Now unless there is some limiting factor like an ITX board with limited cooler there isnt a reason why a 2nd generation Intel Core i5 couldnt release a 2nd generation Intel Core i3 processor.
Understand that the 1st generation Intel Core i3 processors will be using a socket 1156 which is not compatible with the 2nd generation Intel Core processors (socket 1155).
Christian Wood
Intel Enthusiast Team