American Megatrends MegaPlex II, Системное руководство

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Chapter 1 Hardware Installation 19
Step 4 Install Memory,
Continued
System Memory Specifications
Item Description
General 3.3 volt, 168 pin, x 72, ECC DIMM (Dual Inline Memory Module)
buffered memory module, EDO 50/60 ns RAS Access Time.
Voltage The memory chips used on the module must be 3.3 volt parts.
Pinout The module pinout is 168 pin (instead of 72 pins on SIMMs).
Data Bits The memory modules are 72 data bit modules
No ECC It is “raw” single CAS DRAM. There is NO ECC logic on the
memory module. ECC (Error Correction Code) is implemented in
the motherboard chipset. ECC does not require parity chips.
Buffers 3.3V volt buffers (typically 163244 or 16244LVT) are used to buffer
the CAS, Address lines, and Write enables.
The x 72 ECC modules are buffered. The Megaplex memory card
cannot use unbuffered memory modules.
Mode Buffered EDO memory (Fast Page Mode is not supported).
DIMM Types 2 Mx72, 4 Mx72, 8 Mx72, 16 Mx72, and 32 Mx72.
Speed 60 ns/50 ns
Maximum Memory Up to 32 DIMMs can be installed to provide up to 8 GB of system memory.
The minimum memory configuration should be four 2 M x 72 DIMMs (64 MB
of system memory) installed in bank0. You cannot mix memory types within a
memory bank.
Cont’d