IBM Power 720 Overview page 18

The Power 740 includes five PCI Express (PCIe) Gen2 full-height profile slots for installing
adapters in the system. Optionally, an additional riser card with four PCIe Gen2 low-profile
slots can be installed in a GX++ slot available on the backplane. This option extends the
number of slots to nine. The system also includes a PCIe x4 Gen2 slot containing a PCIe 2 or
4-Ports 10/100/1000 Base-TX Ethernet adapter.
If additional slots are required, the Power 740 supports external I/O drawers, allowing for a
maximum of four FC 5802 and FC 5877 PCIe drawers. This increases the number of
available slots by 40 to 45 PCIe slots in total. Note that the second processor card is
necessary to support four I/O drawers. With one processor card, only two I/O drawers can be
attached to the system.
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Unavailable: The Integrated Virtual Ethernet (IVE) adapter is not available for the
Power 740.
The Power 740 also implements Light Path diagnostics, which provides an obvious and
intuitive means to positively identify failing components. With Light Path diagnostics, system
engineers and administrators can more easily and quickly diagnose hardware problems.
The Capacity Backup (CBU) designation, offered for the Power 740 system, can help meet
your requirements for a second system to use for backup, high availability, and disaster
recovery. It enables you to temporarily transfer IBM i processor license entitlements and IBM i
user license entitlements purchased for a primary machine to a secondary
CBU-designated system. Temporarily transferring these resources instead of purchasing
them for your secondary system might result in significant savings. Processor activations
cannot be transferred.
Figure 1-2 shows the Power 740 rack model.
Figure 1-2 Power 740 rack model
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IBM Power 720 and 740 Technical Overview and Introduction