Must be populated in sequential order System Memory on

Table 1-8. System Messages (continued)

Message	Causes	Corrective Actions

DIMMs must be populated in	The specified DIMM is inaccessible to	Populate 2, 4, 8, or 12 DIMMs
sequential order beginning	the system due to its location. DIMMs	sequentially beginning with slot 1. See
with slot 1. The following	must be populated in sequential order,	"System Memory" on page 63.
DIMM is electrically	beginning with slot 1.
isolated: DIMM x.

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.

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).

Error: Memory failure detected. Memory size reduced. Replace the faulty DIMM as soon as possible.

Faulty or improperly seated memory	See "Troubleshooting System Memory"
module(s).	on page 102.

!!*** Error: Remote Access	Remote Access Controller initialization	Ensure that the Remote Access Controller
Controller initialization	failure.	is properly installed. See "RAC Card" on
failure*** RAC virtual USB		page 71.
devices may not be
available...

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	See "Getting Help" on page 125.
	system board.

Dell 1950 owner manual Must be populated in sequential order System Memory on

Models: 1950

must be populated in sequential order,

"System Memory" on page 63.

beginning with slot 1.

failure.

is properly installed. See "RAC Card" on

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