There are several system initialization solutions for Intel architecture. Choosing the solution that is best for a given architecture migration depends on requirements such as boot speed, boot loader size, and the amount of configurability that the system needs to support. With these factors in mind, boot loaders either target closed box designs or open box designs. Other architectures, such as PowerPC+ or ARM +, are accustomed to getting the boot logic solution through open source or from their silicon vendor. This article provides an overview of the Intel architecture system initialization solutions, which include custom boot loaders and Basic Input/Output System (BIOS).