Table 12. Parts list (continued)
Index Description
Tier 1 CRU
Tier 2
CRU
FRU
Consuma-
ble and
Structural
parts
22
Front I/O assembly, server models with eight or
sixteen 2.5-inch drive bays
√
23
Front I/O assembly, server models with eight
3.5-inch drive bays
√
24
System board
√
25
CMOS battery (CR2032)
√
26
System fan
√
27
DIMM
√
28
M.2 drive
√
29
M.2 retainer
√
30
M.2 backplane
√
31
Riser 1 bracket
√
32
Riser 2 bracket
√
33
Riser card
√
34
PCIe adapter
√
35
TCM/TPM adapter (for Chinese Mainland only)
√
50 ThinkSystem SR550 Maintenance Manual