I was wondering, as the title says, will a 2nd gen intel motherboard work with 3rd gen intel i-5 processor? The sockets are the same but I wasnt sure. I have not upgraded or built a machine in a while and im a little out of the loop.
By default, it doesn't work. You must do a BIOS update. And there's the catch... Google IF the producer of that motherboard offer a BIOS update. Some do, some don't.
A BIOS update is needed for the board to recognise the new chips and boot successfully. Most motherboard manufacturers made said updates available though i'm sure there are exceptions out there.
If you are upgrading a machine then this is generally no problem. You just run the BIOS update before you start work on the hardware upgrades.
If you are building a machine from second hand parts, repairing a machine that is belived to have a failed CPU or for some strange reason have chosen to buy obsolete parts new-old-stock this can be more of a problem because you can get into a catch 22 situation where you can't boot the board to apply the BIOS update unless you have an older CPU to hand.