According to the HWInfo-Link you gave, GT230 is either made of G92 or G94 chips. According to Nvidia GT230 is... not yet conceived.
Given the Info in the drivers, the HWInfo, it seems that something like a Letter-Letter-Digit-Digit-Digit is derived from some number of ALUs (maybe even with a given frequency and a number of bits in the memory interface, basic specs, so to say. If those 48 ALUs are delivered by G92, G94, GT216 or something else seems not to be relevant.
Given the Info in the drivers, the HWInfo, it seems that something like a Letter-Letter-Digit-Digit-Digit is derived from some number of ALUs (maybe even with a given frequency and a number of bits in the memory interface, basic specs, so to say. If those 48 ALUs are delivered by G92, G94, GT216 or something else seems not to be relevant.