How do I install additional graphics cards on an HP Z840 workstation?
Before installing, ensure compatibility with your model by checking QuickSpecs (http://www.hp.com/go/qs/) or consult maintenance guide. Insert the card into a PCIe slot and secure it, then connect necessary cables to monitor(s). Update drivers through Support Center or download from HP website.
From the official HP Z840 Workstation manual, page 15
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