Memory
Option #	Manufacturing Part #	Description	Previous Part #
X7056A	4 GB (4 × 1GB SDRAM DIMMs)
X7056A	501-7386 [F]	1GB SDRAM DIMM, L	501-6109 [F]
X7051A [S]	2 GB (4 × 512MB SDRAM DIMMs)
X7051A [S]	501-7385 [F]	512MB SDRAM DIMM, L	501-5030 [F] 540-5085
X7053A [S]	1 GB (4 × 256MB SDRAM DIMMs)
X7053A [S]	501-5401 [F]	256MB SDRAM DIMM	540-5084
X7058A-Z [S]	8 GB (4 × 2GB SDRAM DIMMs), L
	540-6489 [F]	2GB SDRAM DIMM Assembly, L	n/a
	501-6242	2GB SDRAM DIMM, L	n/a
n/a	501-5030 [F]	512MB SDRAM DIMM	540-5085
n/a	501-6109 [F]	1GB SDRAM DIMM	n/a
n/a	540-5086 [F]	1GB SDRAM DIMM	n/a
n/a	F511-1030 ¹³ [F]	Package of 25 × 512MB SDRAM DIMMs	n/a
n/a	501-7385 [F]	512MB SDRAM DIMM, L	501-5030 [F] 540-5085
n/a	F511-1031 ¹⁵ [F]	Package of 25 × 1GB SDRAM DIMMs	n/a
n/a	501-7386 [F]	1GB SDRAM DIMM, L	501-6109 [F]

¹³ See FAB article1000920 (formerly 201233) for details.
¹⁵ See FAB article1000920.1 (formerly 201233) for details.
NOTE: 1.8GHz US IV+ Uniboards and 2GB DIMMs require OBP 5.20.1 or higher
NOTE: For Sun Fire 3800-6800, 1GB DIMMs 501-6109 and 540-5086 are only supported on 900MHz and faster system boards.

Table Legend
[F] = Field Replaceable Unit (FRU) [C] = Customer Replaceable Unit (CRU) [S] = Supported, but can no longer be ordered with this system [N] = No longer supported for this system Price = Price this Part