IBM System x3550 M4 Installation And Service Manual page 25

Table 1. Server features and specifications
Microprocessor (depending on the
model):
v Supports up to two multi-core
microprocessors (one installed)
v Level-3 cache
v Two QuickPath Interconnect (QPI)
links speed up to 8.0 GT per
second
Notes:
v Use the Setup utility program to
determine the type and speed of
the microprocessors.
v For a list of supported
microprocessors, see
http://www.ibm.com/systems/
info/x86servers/serverproven/
compat/us/.
Memory (depending on the model):
v Minimum: 2 GB
v Maximum: 768 GB
– 64 GB using unbuffered DIMMs
(UDIMMs)
– 384 GB using registered DIMMs
(RDIMMs)
– 768 GB using load reduction
DIMMs (LRDIMMs)
v Type:
– PC3-8500 (DDR3-1066),
PC3-10600 (DDR3-1333),
PC3-12800 (DDR3-1600), or
PC3-14900 (DDR3-1866)
– Single-rank, dual-rank, or
quad-rank
– Registered DIMM (RDIMM),
unbuffered DIMM (UDIMM), or
load reduced DIMM (LRDIMM)
v Slots: 24 dual inline
v Supports (depending on the
model):
– 4 GB UDIMM
– 2 GB, 4 GB, 8 GB, and 16 GB
RDIMMs
– 32 GB LRDIMM
SATA optical drives (optional for
2.5-inch models):
v DVD-ROM
v Multi-burner
Hard disk drive expansion bays
(depending on the model):
v 2.5-inch models: Up to eight
2.5-inch hot-swap SAS/SATA hard
disk drive bays (with an optional
optical drive bay)
v 3.5-inch models: Up to three
3.5-inch hot-swap SAS/SATA or
simple-swap SATA hard disk drive
bays
PCI expansion slots:
Supports two PCI riser slots:
v Slot 1 supports low-profile cards.
– PCI Express 3.0 x16
v Slot 2 supports half-length,
full-height cards.
– PCI Express 3.0 x8
– PCI Express 3.0 x16 (two
microprocessors installed)
– PCI-X 64-bit/133 MHz
Chapter 1. The IBM System x3550 M4 server
7