238 Upgrade and Maintenance Manual RX2540 M4
Expansion cards and backup units
9.1.1 Riser modules
There are two types of PCIe riser modules available:
– A short riser card holder: HL means cards with half length (about 130 mm)
– A long riser card holder: FL means cards with full length (312 mm)
9.1.1.1 Population rules
– Only riser modules of the same type can be used.
– Up to two riser modules can be installed.
– If only one riser module is installed it must be installed on the right side.
Figure 146: Installation locations of the riser modules
For details, see section "Expansion cards in riser modules (HL)" on page 280
and section "GPGPU cards in riser modules (FL)" on page 290.
Riser module 1Riser module 2
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