Sun Oracle Fire X4470 M2, Service Manual

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Chapter 1 Sun Server X2-4 Service Manual Overview 1-5
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Accommodates x4 and x8 Single-Rank, Dual-Rank, Quad-Rank RDIMMs
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Supports up to 2 RDIMMs per DDR3 channel (8 DIMM slots per memory riser)
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DDR3 speed: 1067 MT/s or 978 MT/s (dictated by SMI speeds of CPUs)
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DRAM Technology: 2 or 4 Gb die, 1.35-volt or 1.5-volt operation
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DIMM Capacity: 4, 8, 16 GB (16 GB with Quad-Rank DIMMs only)
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Currently supported DIMMs are PC3L RDIMMs, dual-rank in 4-, 8-, and
quad-rank 16-GB sizes
For more information about CPUs, memory risers, and memory layout, including
guidelines for populating memory risers and DIMMs, see
Section 4.1 “Servicing
Memory Risers and DIMMs (CRU)” on page 4-1 .
FIGURE 1-3
shows the architecture of the server memory.
FIGURE 1-3
Memory Architecture
1.1.5 Cooling
The Sun Server X2-4 is cooled from front to back. Cooling occurs in two areas of the
chassis, separated by a plastic dividing wall. In the power supply cooling zone, fans
at the back of the power supplies cool the drive bays as well as the power supplies,