What might indicate an issue if a system restarts after CPU installation?

High system temperatures can indeed indicate an issue if a system restarts after CPU installation. When a CPU is installed, it generates heat during normal operation. If the CPU cooler is not properly installed, if there is insufficient thermal paste, or if the cooling system is inadequate, the CPU can overheat. Most modern CPUs have built-in thermal protection which causes the system to shut down or restart to prevent damage from excessive temperatures. Therefore, if the system is restarting immediately after a CPU installation, it is crucial to check the cooling solution and ensure that the CPU is operating within safe temperature ranges.

In comparison, while low voltages can lead to instability in the system, they are less frequently the primary cause for restarts occurring immediately after hardware installation. Dirty connectors might cause performance issues or failures in the connection but are less likely to solely cause a restart. Lastly, incompatible software drivers typically do not directly impact the hardware's ability to run immediately after installation, as they usually affect software and application performance rather than the hardware initialization process.