FIC VT-502, Manual, Page: 17 / 65

Installation Procedures
13
2). Install System RAM Modules
DRAM and SDRAM
The working space of the computer is the Random Access Memory (RAM).
The system cannot act upon data unless it is loaded into RAM. When more
memory is added, the working memory of the computer is larger, thereby
increasing total performance.
The VT-502’s RAM is comprised of four industry standard 72-pin Single
In-line Memory Modules (SIMMs) and two 168-pin Dual In-line Memory
Modules (DIMMs)
. Each SIMM socket supports from 4 to 128MB FPM (Fast
Page Mode) and high-speed EDO (Extended Data Out) DRAM . Each DIMM
socket is able to support up to 64MB EDO DRAM and lightning-fast SDRAM
(Synchronous DRAM).
SDRAM is an advanced new memory technology that boosts overall system
performance with its ability to synchronize all operations with the
processor clock signal. This makes the implementation of control interfaces
easier, and speeds up column access time. SDRAM features an on-chip burst
counter that can be utilized to increment column addresses for very fast
burst access, which means that SDRAM allows new memory access to be
initiated before the preceding access has been finished.
Before making DRAM upgrades you should verify the type and speed of the
RAM currently installed from your dealer. Installing mixtures of RAM types
other than those described in this manual, will have unpredictable results.