Optional I/O books
The use of two Optional I/O Books requires six processors to be installed. The usage of all four Optional I/O Books requires all eight processors to be installed.
The following table shows the ordering information for the optional I/O Books.
Table 20. I/O Book options
| Part number | Feature code | Description | Maximum supported x3950 X6 |
| 44X4049 | A4A2 | X6 Half-Length I/O Book | 4 |
| 44X4051 | A4A3* | X6 Full-Length I/O Book | 4 |
* The Full-length I/O Book can be ordered only as an option. It is not available through CTO because the Full-length I/O Book cannot be shipped installed in the server
The following figure shows the two optional I/O Books: the Half-length I/O Book and the Full-length I/O Book.
Figure 9. Half-length I/O Book and the Full-length I/O Book
The following figure shows the Half-length I/O Book.
Figure 10. Half-length I/O Book
Each slot in the Half-length I/O Book and the Full-length I/O Book supplies up to 75 W of power.
The Full-length I/O Book also includes two auxiliary power connectors. With the usage of these connectors and the supplied power cords, the I/O book supports one double-wide adapter up to 300 W. The auxiliary power connectors are as follows:
- One 2x4 power connector, which supplies up to 150 W of additional power to the adapter
- One 2x3 power connector, which supplies up to 75 W of additional power to the adapter
The combined power consumption of all the adapters that are installed in the Full-length I/O Book cannot exceed 300 W.
Note: The 2x3 connector is intended to be used only when one adapter is installed in the first x16 slot (the up-most slot in the following figure), either requiring 225 W or 300 W of power. The location of the 2x3 connector prevents an adapter from being installed in the other x16 slot.
Figure 11. Full-length I/O Book
The Half-length I/O Book installs flush with the Primary I/O Book at the rear of the server. The Full-length I/O Book, when installed, adds a 99 mm (3.9 in.) mechanical extension to the base length dimension of the chassis.
The following figure shows a Full-length I/O Book and a Half-length I/O Book installed in the server.
Figure 12. Optional I/O Books that are installed (x3850 X6 shown)
