The CRU locations are shown in the following figure.
Figure 51 CRU Locations
1 DVD drive (CRU)
2 DIMMS (CRUs) Note: A maximum of eight DIMMs are supported in single-processor systems and the DIMMs must be installed in DIMM sockets associated with the P0 processor socket.
3 Battery (CRU)
4 PCIe riser for slots 3 and 4
5 Internal HBA card (installs in slot 4 on PCIe riser for slots 3 and 4)
6 PCIe card (installs in slot 3 on PCIe riser for slots 3 and 4)
7 PCIe riser for slot 1 (Nonfunctional in single-processor systems.)
8 USB flash drives