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The CPUs are connected together with a 100 MHz frontside bus, but supply data at an effective rate of 400 MHz using the
Memory used in the x440 is standard 133 MHz ECC SDRAM DIMMs; however, the 133 MHz DIMMs are run at 100 MHz (for parts availability reasons). With 2 GB DIMMs, up to 32 GB can be installed using all 16 DIMM sockets. The memory is
The second SMP Expansion Module can be installed when more than four Xeon MP processors, or two Xeon DP processors, are required. This also enables the system to have up to 64 GB of RAM, using 2 GB DIMMs. The block diagram with two SMP Expansion Modules is shown in Figure
Note: When Xeon DP processors are used, only two CPUs can be installed in each SMP Expansion Module. The processors are installed in CPU positions 1 and 4. Positions 2 and 3 must hold air baffles to maintain proper air flow.
Chapter 1. Technical description | 9 |