Configuring system memory, Memory combinations, Upgrade guide – Asus P/I-P55SP3AV User Manual
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upgrade Guide
Configuring System Memory
If you want to add system memory, you should use the configu
ration options and specifications shown in this section.
Memory Combinations
You can configure the system memory in a variety of ways, us
ing different combinations of SIMM modules. Using the 4 SIMM
sockets there are many configuration options.
Please note:
• Modules must be installed in pairs, in sequence, i.e. SIMM 1
& 2, SIMM 3 & 4, or all four sockets.
• Modules pairs must be the same size.
• Required Specifications:
Module Size:
Single-sided SIMMS: 1MB, 4MB, 16MB, 64MB
Double-sided SIMMS: 2MB, 8MB, 32MB, 128MB
DRAM Type: Fast Page Mode, Asymmetric or EDO (Extended
Data Output)
DRAM Speed: 70ns or faster for 50, 60 or 66MHz external
clock. EDO DRAM requires 60ns or faster for a 66MHz exter
nal clock setting.
RAS access time [Trac]: 60ns - 70ns
CAS access time [Tcac]: 10ns - 25ns
Parity: Either parity or non-parity
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