A computer's CPU is the complete primary processor. The DIE by contrast is a processor’s most important semiconductor, since the transistors for signal processing are placed on it. The CPU can be described as a carrier board for the DIE. A modern DIE is produced to 32 nanometres, corresponding to several hundred million transistors on 1cm2.
A dual rail is a 12V power supply voltage divided between two sub-rails. During the splitting of the individual voltage rails, the voltage remains at 12V, although the current is divided between the two sub-rails.
DC-DC (direct current to direct current) is an innovative technology used by power supply manufacturers. Conventional power supplies use a transformer to generate the 3.3V, 5V and 12V current. With DC-DC technology, only the 12V current need be generated in the transformer. Potential transformers are used to create the other two voltage rails.
The acronym stands for "Direct Current". Direct current is electricity that does not change its direction (positive or negative).
dB(A) is used as a measurement of sound pressure levels. The capital A in parenthesis indicates that the sound pressure is measured with a filter in front of the measuring device to replicate the sensitivity of the human ear. In technical usage, manufacturers indicate volume in dB(A).