In accordance with a specific embodiment of the present disclosure, hardware periodically monitors a fetch cycle that fetches data associated with an address to determine performance parameters associated with the fetch cycle. A door is disposed on the front of the housing for closing the loading opening. One of the first sealant and the second sealant is a glass layer and the other is a resin layer. A housing made of a mold compound surrounds a backside of the chip and parts of the substrate adjacent to the wiring. According to the invention, the sleeve is connected to said tie member via a control ring integral with the tie member, and the mandrel comprises a removable quick mounting means enabling the sleeve to be secured to said control ring.