The first time I ever installed an intel CPU, which was earlier this year, a sandy bridge, forcing down that lever, and hearing that scratching, grinding noise, I nearly pood myself. I immediately released the lever, took out the CPU, checked everything, then reseated it and tried again. The crunch happened once again. Owners of Noctua CPU coolers* can obtain the NM-i115x-1200 Mounting-Kit free of charge via this form.A proof of purchase (photo, scan or screenshot of the invoice) of both a Noctua CPU cooler and either a socket LGA115x/LGA1200 mainboard or socket LGA115x/LGA1200 CPU are required. The NM-i115x-1200 SecuFirm2™ Mounting-Kit is also available for purchase at some of our resellers.