Adding or Removing a Memory Module

Adding System Memory and Upgrading the Internal Hard Drive

For proper system operation, the DIMMs must be industry-standard 168-pin, 100 MHz, unbuffered, PC100-compliant SDRAM DIMMs, or 133 MHz, unbuffered, PC133-compliant SDRAM DIMMs. If two DIMMs are installed, they must be the same speed. This computer comes equipped with 133 MHz DIMMs.

The SDRAM DIMMs must support CAS Latency 2 or 3 (CL = 2 or CL = 3). They must also contain the mandatory Joint Electronic Device Engineering Council (JEDEC) Serial Presence Detect (SPD) information. DIMMs constructed with x4 SDRAM are not supported; the system will not start when equipped with unsupported DIMMs.

Adding or Removing a Memory Module

ÄCAUTION: Your memory module sockets have gold-plated metal contacts. When upgrading your memory, it is important to use memory modules with gold-plated metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with each other.

ÄCAUTION: Static electricity can damage the electronic components of the personal computer. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. Refer to Appendix C, “Electrostatic Discharge” for more information.

CAUTION: When handling a memory module, be careful not to touch any of the contacts. Doing so may damage the module.

1.Exit all software applications, shut down the operating system software, turn off the personal computer and any external devices, then disconnect the power cord from the power outlet.

2.Remove the access panel. Refer to “Removing and Replacing the Access Panel” on page 3-1.

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