Справочник Пользователя для Cisco 16GB USB UCS-USBFLSHB-16GB=

When considering the memory configuration of your server, you should consider the following items: 

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Each channel has two DIMM slots (for example, channel A = slots A1 and A2).

— Each channel can operate with one or two DIMMs installed.

— If a channel has only one DIMM, populate slot 1 first (the blue slot).

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When both CPUs are installed, populate the DIMM slots of each CPU identically.

— Fill blue slots in the channels first: A1, D1, B1, E1, C1, F1

— Fill black slots in the channels second: A2, D2, B2, E2, C2, F2

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Any DIMM installed in a DIMM socket for which the CPU is absent is not recognized.

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For optimum performance, populate at least one DIMM per memory channel per CPU.

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When populating DIMM slots, multiples of 6 DIMMs are best for achieving optimum 
performance, since there are 3 memory channels per CPU socket and 2 CPUs must be 
populated.

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At 1 DPC and 2 DPC, 1600-MHz DIMMS will run at 1600 MHz (provided the CPU supports 1600 
MHz DIMMs) and 1333-MHz DIMMs will run at 1333 MHz.

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When mixing DIMMs, the following rules need to be followed:

— When mixing DIMMs of different densities (sizes), populate DIMMs with the highest 

density first. For example, if you have to mix 16 GB with 8 GB DIMMs, populate 16 
GB DIMMs in blue slots (or bank 1) and then 8 GB in black slots (or bank 2).

— When mixing DIMMs with different ranks, populate DIMMs with the higher rank first. 

For example, populate 16 GB 2R or 8 GB 2R before 4 GB 1R DIMMs.

— DIMMs of different sizes (4 GB, 8 GB, 16 GB) can be mixed within a channel. Total 

memory size in each single channel should be the same. For example, if you are 
mixing 4 GB and 8 GB DIMMs to achieve total 72 GB (6x8 GB + 6x4 GB) for a server, 
then populate blue slots with 8 GB DIMMs and black slots with 4 GB DIMMs and total 
memory size should be 12 GB for each of the 3 channels for both CPUs.

— When mixing DIMMs, all the DIMMs in the server must be the same speed.