Notes, Notices, and Cautions Throughout this guide, blocks of text may be accompanied by an icon and printed in bold type or in italic type. These blocks are notes, notices, and cautions, and they are used as follows: NOTE: A NOTE indicates important information that helps you make better use of your computer system. NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
Dell Precision™ WorkStation 620 System Memory Upgrade This document provides instructions for upgrading the Rambus inline memory modules (RIMMs) on the Dell Precision WorkStation 620. Dell Precision 620 systems support dual, direct, Rambus dynamic random-access memory (RDRAM) modules. These RIMMs feature error checking and correction (ECC). NOTES: Dell recommends that only a technically knowledgeable person perform this procedure. Dell recommends that you read the entire procedure before you begin.
d. Select the appropriate operating system (OS) and language for the computer to be updated. e. Select FlashBIOS Updates for the download category. f. Click Go and follow the instructions on screen to create a diskette containing the BIOS update files. NOTE: For some Dell systems, you are given a choice to create a diskette containing the BIOS update files or to download a file you can use from the hard drive. Select the choice to use the file that creates an installation diskette. 2.
to go out (see the internal system board label that is attached to the cover of your computer). 3. Ground yourself by touching an unpainted metal surface on the chassis, such as the metal around the card-slot openings at the back of the computer, before touching anything inside your computer. Dell recommends that you use a wrist grounding strap in this operation.
MEC cover RIMM1_A RIMM2_A channel A riser board RIMM3_B RIMM4_B Figure 1-1.
RIMM Installation Guidelines You must install RIMMs in pairs. This means that the RIMM in each socket on one MEC must be the same memory capacity, density, and speed as the corresponding RIMM in the same socket on the other MEC. Also, for either channel A or B of each MEC, if one socket contains a RIMM, then the other socket must contain either another RIMM or a continuity RIMM (CRIMM).
Table 1-1. Sample Factory-Installed RIMM Configurations (per MEC) (continued) Populate both MECs as follows: For Total Desired Memory: RIMM1_A (top) RIMM2_A RIMM3_B RIMM4_B (bottom) 2048 MB Empty CRIMM 512 MB 512 MB 2560 MB CRIMM 256 MB 512 MB 512 MB 3072 MB 256 MB 256 MB 512 MB 512 MB 3072 MB CRIMM 512 MB 512 MB 512 MB To upgrade memory, perform the following steps. NOTICE: See “Protecting Against Electrostatic Discharge” in your System Information Guide.
. Reconnect the computer and peripherals to their power sources, and turn them on. As the system boots, it detects the presence of the new RIMMs and automatically changes the system configuration information in system setup.
15. Run the Dell Diagnostics to verify that the memory modules are operating properly. NOTE: For information on troubleshooting and running the Dell Diagnostics, see “Troubleshooting” in the User’s Guide. Installing a RIMM NOTICE: Before you upgrade RIMMs, you must upgrade the BIOS. See “Upgrading the BIOS” on page 1-1 for instructions. If a RIMM is already installed in the socket you want to use, you must remove it. For instructions, see “Removing a RIMM” on page 1-9.
Removing a RIMM NOTICE: To avoid damage to the memory module, press the securing clips with equal force applied at each end of the socket. To remove a RIMM, press the securing clips outward simultaneously until the RIMM disengages from the socket (see Figure 1-3). It should pop out slightly. securing clips (2) Figure 1-3. Removing a RIMM support.dell.
1-10 System Memory Upgrade
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