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System Memory: Dell Precision WorkStation 220 System User's Guide
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System Memory: Dell Precision™ WorkStation 220 System User's
Guide
You can increase system memory up to 1 gigabyte (GB) by using Rambus
dynamic random-access memory (RDRAM) Rambus in-line memory modules (RIMMs). Figure 8 in "Inside Your Computer" shows the location of the RIMM sockets
on the system board. Sockets that do not contain a RIMM must contain a Rambus continuity
module (RCM).
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NOTES: To reach the maximum 1-GB memory
total, you must install two 512-megabyte (MB) RIMMs (when available) that each have a
maximum of 16 memory devices. The system supports no more than a total of 32 memory
devices on all installed RIMMs. See Figure 1 for the
location of a label on the RIMM that identifies the number of memory devices it contains.
You can also determine the number of memory devices installed through the System Memory option in System
Setup. The system does not support
RIMMs with six memory devices.
All RIMM sockets must be occupied either by a RIMM or an RCM. |
Figure 1. RIMM Label Showing
Number of Memory Devices
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| 1 |
Number of memory devices in RIMM |
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For optimum operation, Dell recommends that you install a RIMM in
socket A first (closest to the processor) before installing a RIMM in socket B.
If you are installing RIMMs with different memory sizes, insert the
RIMM with the higher memory size in socket A, and insert the RIMM with the lower
memory size in
socket B. For the location of sockets A and B, see Figure 8 in "Inside Your Computer."
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NOTE: Before disconnecting a peripheral from
the system or removing a component from the system board, verify that the standby power
light-emitting diode (LED) on the system board has turned off. For the location of this
LED, see Figure 8 in "Inside Your Computer." |
To upgrade memory, perform the following steps.
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CAUTION: To avoid the possibility of electric
shock, turn off the computer and any peripherals, disconnect them from their electrical
outlets, and then wait at least 5 seconds before you remove the computer cover. Verify
that the standby power light-emitting diode (LED) on the system board is off. Also, before
you upgrade memory, see the other precautions in "Safety First—For You and Your Computer. " |
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CAUTION: RIMMs can get extremely hot during
system operation. Be sure that the RIMMs have had sufficient time to cool before you touch
them. |
NOTICE: Before you upgrade the RIMMs, you must perform the steps under BIOS
Recovery Utility.
- Remove the computer cover according to the instructions in "Removing and Replacing the Computer Cover."
- Rotate the power supply as described in "Rotating
the Power Supply Away From the System Board."
- Remove any modules (RCMs or RIMMs) that
occupy sockets in which you plan to install the upgrade RIMMs.
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NOTE: The system supports no more than a total of 32 memory devices on
all installed RIMMs. See Figure 1 for the location of
a label on the RIMM that identifies the number of memory devices it contains. You can also
determine the number of memory devices installed through the System Memory option in System
Setup. |
- Install the upgrade RIMMs.
- Locate the plastic securing clips at each end of the socket (see Figure 2).
- Press the clips outward until they snap open.
- Press the RIMM straight into the slot running down the center of the socket until the
securing tabs snap into place around the ends of the RIMM.
Figure 2. Installing a
RIMM
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| 1 |
Securing clips (2) |
| 2 |
Notches (2) |
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- Rotate the power supply back into position, making sure that the
securing tab snaps into place.
- Replace the computer cover, and reconnect your computer and peripherals to their
electrical outlets and turn them on.
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NOTE: After you remove and replace
the cover, the chassis intrusion detector causes the following message to appear on the
screen at the next system start-up:
ALERT! Cover was previously removed. |
The system detects that the new memory does not match the existing
system configuration information and generates the following message:
The amount of system memory has changed.
Strike the F1 key to continue, F2 to run the setup utility
- Press <F2> to enter System Setup, and check the value for System Memory.
The system should have already changed the
value of System Memory to reflect the newly installed memory. Verify the
new total. If it is correct, skip to step 9.
- If the memory total is incorrect, turn off and disconnect your computer and peripherals
from their electrical outlets. Remove the computer cover, rotate the power supply, and
check the installed RIMMs to make sure that they are seated properly in their sockets.
Then repeat steps 4, 5, 6, and 7.
- Reset the chassis intrusion detector by selecting System
Security and changing Chassis
Intrusion to Enabled or Enabled-Silent.
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NOTE: If a setup password has been
assigned by someone else, contact your network administrator for information on resetting
the chassis intrusion detector.
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- When the System Memory total is correct, press
<Esc> to exit System Setup.
- Run the Dell
Diagnostics to verify that the RIMMs are operating properly.
NOTICE: Before you upgrade the RIMMs, you must perform the steps under BIOS
Recovery Utility.
To remove a module (RCM or RIMM), press the securing clips outward
simultaneously until the module disengages and pops out slightly from the socket (see
Figure 3). If you remove an RCM or RIMM, you must install another RCM or RIMM in the empty
socket before turning on the computer.
Figure 3. Removing a
Module
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