This variable gain amplifier is provided with an operational amplifier. In a driver circuit that is comprised of a set of ODT legs and a set of non-ODT legs, a a method allows selective activation and deactivation of tuning transistors in the ODT and non-ODT legs. The heat sink surface has a pattern of channels therein which define multiple heat sink substructures. A plurality of second conductive contacts can be exposed at an exterior of the semiconductor element. If not, the distance between the circuit and rectangle is calculated along with a recommended placement location, both of which are reported along with the circuit. Caching in and caching out operations are used to load cache lines into the heap or to flush dirty cache lines into the store.