Custom computers are personalized computing systems built to meet specific user needs. Unlike standard models, they allow users to choose components such as the CPU, GPU, RAM, and storage options, ensuring optimal performance for tasks like gaming, graphic design, or data analysis. These systems can be assembled by enthusiasts or purchased from specialized retailers. Custom computers often provide better value and performance compared to pre-built options, as users can select high-quality parts that suit their requirements. Additionally, they offer the flexibility to upgrade components over time, extending the computer's lifespan and capabilities.