When a Mechanical Mage takes office, they are continuously fed with knowledge based on the strength of their Intelligence Attributes, until their brain can no longer absorb the related memory in the short term. At that point, the "fuse" of the Memory Crystal is triggered, interrupting the input.
And with that, the transfer of a Mechanical Mage is concluded.
It can be said without reservation that the higher your Intelligence Attributes at the time of transferring to a Mechanical Mage, the more knowledge you can absorb—thus breezing past the most troublesome learning threshold and possessing the most basic combat abilities of a Mechanical Mage.
If a person's Intelligence Attributes are sufficiently strong, and they themselves are quite talented, then the amount of knowledge they can absorb is even greater, naturally starting from a higher point.