Adaptec SBC-596, SBC-599 manual Installing Dram SIMMs, Installing SIMMs

Installing DRAM (SIMMs)

The SBC-599 CPU card provides four 72-pin SIMM (Single In- line Memory Module) sockets and supports either Fast Page Mode (FPM) or Extended Data Output (EDO) DRAM with a speed of 70 ns or faster. You can install up to 256 MB of RAM.

Installing SIMMs

NOTE 1: Pentium or compatible processors adopt 64 bit data bus. Since 72-pin SIMM can only provide 32 bit data bus width, two SIMM modules are required as one memory bank, and both SIMMs must be the same size and type.

1.Ensure that all power sources are disconnected.

2.Slip the memory module into the socket at a 45 degree angle.

3.Push the module toward the vertical posts at both ends of the socket until the module is upright and the retaining clips at both ends of the module click into place. When positioned correctly, the pins on top of the vertical posts should correspond to the circular holes on the ends of the module.

4.Repeat steps 2 and 3 for each module you install.

NOTE 2: Do not insert any SIMM module that contains more than 24 memory chips. SIMMs contain more than 24 chips exceed the driving capability of new generation chipsets.

Chapter 2 Installation Guide 19