System Board
Option #	Manufacturing Part #	Description	Previous Part #
SELX4001Z [S]	M4000 Motherboard Upgrade to SPARC64 VII+ 2.66GHz
	7047314 [F]	Motherboard Cage (MOBO2/MBU_A_2) includes motherboard 7048160	n/a
	300-2009 ²⁵ [F]	1.2V DC-DC Converter, DDC_A	n/a
	300-2010	3.3V DC-DC Converter, DDC_B [SKU]	n/a
n/a	541-0893 [F]	Motherboard Cage (TMOBO/MBU_A) includes motherboard 501-7676	n/a
	300-2009 ²³ [F]	1.2V DC-DC Converter, DDC_A	n/a
	300-2010	3.3V DC-DC Converter, DDC_B [SKU]	n/a
n/a	541-4359 [F]	Motherboard Cage (MOBO2/MBU_A_2) includes motherboard 511-1600	n/a
	300-2009 ²⁴ [F]	1.2V DC-DC Converter, DDC_A	n/a
	300-2010	3.3V DC-DC Converter, DDC_B [SKU]	n/a

²³ DDC_A is a valid FRU on an IOU only. On a MBU_A the FRU is the complete MBU_A.
²⁴ DDC_A is a valid FRU on an IOU only. On a MBU_A the FRU is the complete MBU_A.
²⁵ DDC_A is a valid FRU on an IOU only. On a MBU_A the FRU is the complete MBU_A.

Table Legend
[F] = Field Replaceable Unit (FRU) [C] = Customer Replaceable Unit (CRU) [A] = Alternate, can be used in system; wasn't used during production [S] = Supported, but can no longer be ordered with this system [N] = No longer supported for this system Price = Price this Part