Different kinds of PCI slots have developed over time to accommodate shifting performance needs and advances in technology. Often known as PCI 1.0, the original PCI slot has a bandwidth of 133 MB/s & is normally quick hit slots32 bits wide. Later versions, such as PCI 2.0 and PCI 2.1, which enhanced bandwidth capabilities and added features like hot-swapping—which enables users to swap out components without shutting down the system—were made possible by the foundation this version laid. Restrictions and Early Adoption. During the late 1990s and early 2000s, desktop computers and servers began to use these early PCI slot versions extensively.
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