26 About Your System
DIMMs must be populated in
sequential order beginning
with slot 1. The following
DIMM is electrically
isolated: DIMM x.
The specified DIMM is inaccessible to
the system due to its location. DIMMs
must be populated in sequential order,
beginning with slot 1.
Populate 2, 4, 8, or 12 DIMMs
sequentially beginning with slot 1. See
"System Memory" on page 63.
DIMMs should be installed
in pairs. Pairs must be
matched in size, speed,
and technology.
Mismatched or unmatched DIMMs
installed; faulty or improperly seated
memory module(s). The system will
operate in a degraded mode with
reduced ECC protection. Only memory
installed in channel 0 will be
accessible.
Ensure that all pairs of memory modules
are of the same type and size and that they
are properly installed. See "System
Memory" on page 63. If the problem
persists, see "Troubleshooting System
Memory" on page 102.
Dual-rank DIMM paired with
Single-rank DIMM - The
following DIMM/rank has
been disabled by BIOS:
DIMM x Rank y
Mismatched DIMMs installed; faulty
memory module(s). The system has
detected a dual-rank DIMM paired with
a single-rank DIMM. The second rank
of the dual-rank DIMM will be
disabled.
Ensure that all pairs of memory modules
are of the same type and size and that they
are properly installed. See "System
Memory" on page 63. If the problem
persists, see "Troubleshooting System
Memory" on page 102.
Error: Incorrect memory
configuration. DIMMs must
be installed in pairs of
matched memory size,
speed, and technology.
Mismatched or unmatched DIMMs
installed; faulty or improperly seated
memory module(s).
Ensure that all pairs of memory modules
are of the same type and size and that they
are properly installed. See "System
Memory" on page 63. If the problem
persists, see "Troubleshooting System
Memory" on page 102.
Error: Memory failure
detected. Memory size
reduced. Replace the
faulty DIMM as soon as
possible.
Faulty or improperly seated memory
module(s).
See "Troubleshooting System Memory"
on page 102.
!!*** Error: Remote Access
Controller initialization
failure*** RAC virtual USB
devices may not be
available...
Remote Access Controller initialization
failure.
Ensure that the Remote Access Controller
is properly installed. See "RAC Card" on
page 71.
FBD training error: The
following branch has been
disabled: Branch x
The specified branch (channel pair)
contains DIMMs that are incompatible
with each other.
Ensure that only Dell-qualified memory is
used. Dell recommends purchasing
memory upgrade kits directly from
www.dell.com or your Dell sales agent to
ensure compatibility.
Gate A20 failure Faulty keyboard controller; faulty
system board.
See "Getting Help" on page 125.
Table 1-8. System Messages (continued)
Message Causes Corrective Actions
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