In order to add more PCI slots to my server I was told to order part # 410570-B21, but What I received is just a card part #408788-001 see the picture here http://quickfiles.net/img/408788-001.JPG
The riser cage will be with the server. You need to remove the card (it takes a star bit) to remove 3 screws then you slide the new one where you take the old one out.
The server will come with a PCIe card installed in the riser cage. You will take the cover off of the server and remove the two hand screws to lift the cage out of the server then you swap the card and re-install in the server.
The server has 5 PCI-E slots as standard (2 on system board and 3 on riser installed in cage). Products numbers 410570-B21 and 408788-001 indicate the same part - mixed riser (PCI-E/PCI-X). Installing this riser requires removing standard 3-slot PCI-E riser. After installing you will have still 5 slots, but two of them will be PCI-X.
Depending on the server, the riser cage could be PCI-X/PCIe or all PCIe. Custom built from HP, come as you order. If you bought off the shelf from a vendor you might need to order the other riser cage.
