Your PC has 2x PIC-E x16 slots. Just plug your PCI-E x1 card into any one of them. Despite the card slot being longer than the connector of the PCI-E card, it will work just fine.
Your PC has 2x PIC-E x16 slots. Just plug your PCI-E x1 card into any one of them. Despite the card slot being longer than the connector of the PCI-E card, it will work just fine.