HP 340 Series Service Manual page 72

If an empty connector exists between installed RAM boards, all RAM boards beyond that empty
connector will not be recognized.
Table 3-4 lists each RAM board/slot's address range. Figure 3-11 will help identify them.
Table 3-4. RAM Board/Slot Number and Address Block
RAM Board Top Bottom
Connector /Label Address Address
RAM l/FFF FFFFFFFF FFCOOOOO
RAM 2/FFB
FFBFFFFF FF800000
RAM 3/FF7
FF7FFFFF FF400000
RAM 4/FF3
FF3FFFFF
FFOOOOOO
Figure 3-11. Processor Board RAM Connectors
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Functional Description