Compaq 112726-001 - ProLiant - 6500 Technology Brief page 8

ECG078/0698
T B
ECHNOLOGY RIEF
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four, and each DIMM in a given bank must be the same size, type, and speed. The ProLiant 7000
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memory expansion board has the following features:
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Error Checking and Correcting (ECC) Memory with single-bit error correction and detection
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down to a single DIMM, and multi-bit error detection down to the memory bank.
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Extended Data Out (EDO)
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Expandable to 8 GB (2 memory expansion boards x 16 DIMMS x 256-MB/DIMM).
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Peak data transfer rate of 1.6 GB/s
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. . Concurrent CPU-to-memory and PCI-to-memory accesses.
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B a n k s
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Figure 3: Bank designations and DIMM socket numbers on Memory Expansion Board.
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The peak memory transfer rate of 1.6 GB/s supports the maximum data rates on the processor bus
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(800 MB/s) and PCI buses (532 MB/s) concurrently, using industry standard ECC EDO DIMMs.
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Each memory board contains four banks of 4:1 interleaved DIMMs. Accesses to banks of
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memory on the memory board are overlapped using Address Bit Permuting (ABP). Accesses to
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. . banks of memory that reside on separate boards are overlapped using Card to Card (C2C)
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interleaving. The ABP and C2C interleaving features are automatically enabled when banks of
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. . memory are populated with the same type of DIMMs.
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I/O Board
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The I/O board (Figure 4) has ten expansion slots and three 33-MHz PCI buses:
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Five 64-bit PCI Hot Plug slots (PCI Bus 3)
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Four 32-bit PCI Hot Plug slots (PCI Buses 1 and 2)
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One ISA modem slot
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The five 64-bit PCI expansion slots on PCI Bus 3 include three PCI Hot Plug slots and two PCI
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Hot Plug slots with extended SCSI. All 32-bit PCI adapters work in any of the five 64-bit
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expansion slots, and all 64-bit adapters work in the 32-bit expansion slots. In addition, the two
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extended PCI slots allow the Smart Array 3100ES Controller to route three SCSI buses to the I/O
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1
For more information on Compaq's memory technology, see technology brief Memory
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Technology Evolution, document number 518A/0697.
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(cont.)
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, 60-ns DIMMs in 16-, 32-, 64-, 128-, and 256-MB sizes.
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