option # manufacturing part # description previous part # n/a 541-2109 [c] x8/x8 xaui riser card assembly, rohs:y n/a 341-4139 pci filler panel, rohs:y n/a 501-7719 x8/x8 xaui riser card, rohs:y n/a 541-2736 riser bracket, rohs:y n/a n/a 541-2299 [c] x16/x4 riser, rohs:y n/a option # manufacturing part # description previous part # x4287a [s] 541-3419 [c] 16gb (2 × 8gb ddr2-667 registered ecc dual-rank dimms) n/a 371-4387 8gb ddr2-667 dual-rank memory dimm, rohs:y n/a x6320a [s] 540-7598 [c] 2gb (2 × 1gb) memory fru, rohs:y n/a 371-3845 1 gb registered ecc ddr2-667 dimm, rohs:y n/a x6321a [s] 540-7599 [c] 4gb (2 × 2gb) memory fru, rohs:y n/a 371-3846 2gb registered ecc ddr2-667 dimm, rohs:y n/a x6321a-c [s] 540-7829 [c] 4gb (2 × 2gb) memory fru n/a 371-4160 2gb registered ecc single rank ddr2-667 dimm, rohs:y n/a x6322a [s] 540-7600 [c] 8gb (2 × 4gb) memory fru, rohs:y n/a 371-3847 4gb registered ecc ddr2-667 dimm, rohs:y n/a n/a 371-3651 memory slot filler, ebs93011010, rohs:y n/a