Sub: 649892-001 The HPE?648312-B21 Switch Module is an HP Blade System C-Class 4X FDR Infiniband> network switch. This one comes ready to provide 18x 56GBps Fourteen Data rate (FDR) QSFP ports. This HPE?648312-B21 Switch Module has been removed from a working Blade System C-Class Server, tested for complete functionality by our expert in-house Certified Technician, and is ready to ship today! Purchase with confidence, as the photos above represent the exact quality of your items, and come bundled with our 90 Day Warranty. *Please note, we have additional refurbished HPE Server components in stock; feel free to send a message and we will update the quantity to suit your specific needs.* Thank you for choosing AltaTech for all of your lightning-fast IT needs!