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Turn 2x Full-Height PCIe Slots into 2x 40mm Fans Improve GPU Airflow Universal for PC Cases, Server Chassis and 40mm Fans PCI Slot Cover Bracketfan slot This 4 slot base for Corning® Spider fan out kits can accommodate up to 24 fibers

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fan slot AMD B550 Ultra Durable Motherboard with Pure Digital VRM Solution, PCIe x16 Slot, Dual PCIe Connectors, Realtek GbE LAN, Smart Fan 5 with FAN