How are pins on a PGA CPU inserted into the socket?

The correct answer is that PGA (Pin Grid Array) CPUs use zero insertion force technology to have their pins inserted into the socket. This technology allows for the CPU pins to align properly with the socket without being forced in, which significantly reduces the risk of damaging the delicate pins or the socket during installation.

Zero insertion force technology ensures that the CPU can be placed onto the socket with minimal pressure, allowing for easy alignment and insertion. Once the CPU is positioned correctly, a mechanism locks it into place, ensuring a secure connection without harming the electrical contacts. This careful method is important for maintaining the integrity of both the CPU and the motherboard.

Other methods, such as using a screw, handling by hand alone, or utilizing a hammer, would not provide the gentle, precise fit required for the pins of a PGA CPU and could lead to misalignment or physical damage.