Sun Microsystems Netra CP3060, Руководство пользователя

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Chapter 5 Hardware and Functional Descriptions 5-7
The processor’s core speed, JBus, and DDR-2 speeds in the Sun Netra CP3060 blade
server depend upon total blade server power budget, which shall not exceed 200W
as per the PICMG 3.0 R1.0 specification.
5.1.2 DDR-2 Memory Subsystem
The Sun Netra CP3060 blade server uses industry-standard DDR-2 VLP (0.72-inch)
DIMMs. Each of the four memory controller units (MCUs) inside the
UltraSPARC T1
processor can control up to four DIMMs. The Sun Netra CP3060 blade server only
supports two DIMMs per MCU. The Sun Netra CP3060 blade server supports up to
2-Gbyte VLP DIMMs, for a total system memory capacity of 16 Gbytes.
Some of the key features of the memory subsystem are:
■
Eight 240-pin JEDEC Standard DDR-2 Registered DIMM slots (two DIMM slots
per MCU)
■
Minimum clock frequency of 200 MHz (400MT/sec)
■
Memory controller supports 144 bits (128 bits data, 16 bits ECC)
■
16 Gbytes max (4 Gbytes, 8 Gbytes, 16 Gbytes)
■
Peak memory bandwidth of 25.6 Gbytes/sec @ 200MHz.
5.1.2.1 DIMMs
The organization of the memory subsystem with regard to the connections between
the UltraSPARC T1 processor and the memory DIMMs is shown in
FIGURE 5-3
.
Because the UltraSPARC T1 processor accesses memory with a 128-bit data path
(plus ECC), DIMMs must be installed in pairs. The DIMMs are standard DDR-2
Registered VLP DIMMs. Specific vendors’ DIMMs are qualified by Sun and supplied
as orderable options for system configuration.