Keep expansion cards cooler when chassis airflow is weak or internal temperatures climb. StarTech’s rear slot exhaust cooling fan installs in a PCI, ISA, or AGP expansion slot to move hot air out of the case and away from graphics cards and other add-in components. That direct exhaust path helps reduce thermal stress in legacy desktops where modern cooling layouts are not available. This is a practical fit for systems that still need dependable operation from older video cards, capture cards, or other expansion hardware. By improving heat removal at the rear of the chassis, the fan can help maintain steadier card performance and reduce the risk of overheating-related slowdowns or instability. For IT teams supporting mixed-vintage environments, this kind of targeted cooling is often the difference between a system that merely powers on and one that stays usable under load. It adds focused airflow without requiring a full chassis redesign, making it a cost-effective way to extend the life of aging hardware.