224 Upgrade and Maintenance Manual TX140 S1
Expansion cards and backup units
In this chapter
● "Installing expansion cards" on page 226
● "Removing expansion cards" on page 233
● "Replacing expansion cards" on page 238
● "Installing a BBU" on page 245
● "Replacing a BBU" on page 266
● "Mounting expansion card slot brackets" on page 276
● "Handling SFP+ transceiver modules" on page 284
9.1 Basic procedure
The system board is equipped with four expansion slots:
Figure 108: PCI slot overview
PCI slot Type Function
1PCI
PCI slot for legacy 32-bit / 33 MHz PCI
cards
2PCIe x1
PCIe x1 slot
(mechanical width: x4)
3PCIe x4
Preferred slot for SAS HDD controllers
(mechanical width: x8)
4PCIe x16
PCIe x16 slot
(mechanical width: x16)
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