System battery specificationsThe R740xd system supports CR 2032 3.0-V lithium coin cell system batteries.Expansion bus specificationsThe R740xd system supports up to eight PCI express (PCIe) generation 3 expansion cards that can be installed on thesystem board using expansion card risers. The following tables provide detailed information about the expansion cardriser specifications:Table 10 Expansion card riser configuration for R740xd systemExpansioncard riserPCIe slots on theriserHeight Length LinkRiser 1A Slot 1 Full Height Full Length x16Slot 3 Full Height Half Length x16Riser 2A Slot 4 Full Height Full Length x16Slot 5 Full Height Full Length x8Slot 6 Low Profile Half Length x8Riser 3A Slot 7 Full Height Full Length x8Slot 8 Full Height Full Length x16Table 11 Additional expansion card riser configuration for R740xd systemRiserconfigurationand supportedrisersSlotdescriptionPCIe slots onriser 1 (Heightand length)ProcessorconnectionPCIe slots onriser 2 (Heightand length)ProcessorconnectionPCIe slotson riser 3(Height andlength)ProcessorconnectionRiserconfiguration 4(1A+2A+3A)Three x8 andfour x16 slotsSlot 1: x16 full-height, fulllengthProcessor 1 Slot 4: x16 full-height, fulllengthProcessor 2 Slot 7: x8full-height,full lengthProcessor 2N/A N/A Slot 5: x8 full-height, fulllengthProcessor 2 Slot 8: x16full-height,full lengthProcessor 2Slot 3: x16 full-height, halflengthProcessor 1 Slot 6: x8 lowprofile, halflengthProcessor 1Riserconfiguration 9(1A+2D+3A)Three x8 andfour x16 slotsSlot 1: x16 full-height, fulllengthProcessor 1 Slot 4: x16 full-height, fulllengthProcessor 2 Slot 7: x8full-height,full lengthProcessor 2N/A N/A Slot 5: x8 full-height, fulllengthProcessor 2 Slot 8: x16full-height,full lengthProcessor 2Technical specificationsR740xd Owner's Guide 25