The PLX 9050 is a PCI-to-PCI bridge (also known as a PCIe bridge) developed by PLX Technology, which is now a part of Broadcom. The PLX 9050 chip is often used in systems that require the ability to extend or manage communication between multiple PCI or PCIe devices. This chip is commonly found in servers, workstations, and other high-performance computing systems where additional PCI or PCIe slots are needed.

The PLX 9050 Windows driver enables your Windows operating system to communicate with the PLX 9050 chip, allowing it to function properly within a system. This driver ensures that devices connected through the PLX 9050 bridge can be recognized and interact with the operating system and other hardware.