Hi, There are two riser options, one with two X8 PCIe slots and one with one X16 slot. 
Company just acquired a Dell PowerEdge 730.I notice on Riser 3, there is only 1 expansion slot available (PCI Slot 6). Although there is a Slot 7 listed on the rear of the chassis, and a bracket in place for a card, there is no actual slot. Is there another riser card I can purchase so I can get use of both PCI Slots 6 and 7? Is there a reason why this riser omits the slot to accomodate the #7 slot?  thanks, vin
PE 730 PCI Slots 6&7