The Intel Sandy Bridge processors will be using a new socket, LGA1155, as opposed to the current LGA1156 socket. Noctua has confirmed that the mounting holes for both are identical which means that its LGA1156 coolers will be compatible with LGA1155 provided you have the NM-I3 SecuFirm2 mounting kit. If you do not have that kit for your Noctua cooler and are getting a new LGA1155 motherboard, then Noctua will offer you a mounting kit free of charge. Everyone who owns an older Noctua cooler will be able to contact Noctua and ask for the new NM-I3 SecuFirm2 mounting kit provided you have documentation saying you own an older cooler and a new LGA1155 motherboard or CPU. If you own the NH-C14, NH-D14, NH-C12P SE14, NH-U12P SE2, or NH-U9B SE2 then you already have the NM-I3 SecuFirm2 mounting kit and won't need the upgrade. All the older coolers don't have that mounting kit so you are included in the free upgrade. The NM-I3 SecuFirm2 mounting kit is compatible with all Noctua coolers produced from 2005 to the present.