Sun Fire V480 (A37)
Sun Fire V880 (A30)

Options 7050 / 7051 / 7053 / 7056

501-4489	501-5030	501-5401	540-5086
128MB 3.3V ECC 7ns SDRAM DIMM Option 7050 V880 only	512MB 3.3V ECC 7ns SDRAM DIMM Option 7051	256MB 3.3V ECC 7ns SDRAM DIMM Option 7053	1GB 3.3V ECC 7ns SDRAM DIMM Option 7056 501-6109

CPU to Memory Association

SOCKET	CPU	MEMORY	GROUP	INSTALLATION
J2900 J2901 J3001 J3000	0 1 4 5 0 1 4 5 0 1 4 5 0 1 4 5	A0 A0 A0 A0	1st Group 1st Group 1st Group 1st Group	Required Required Required Required
J7900 J7901 J8001 J8000	2 3 6 7 2 3 6 7 2 3 6 7 2 3 6 7	B0 B0 B0 B0	2nd Group 2nd Group 2nd Group 2nd Group	Required Required Required Required
J3100 J3101 J3201 J3200	0 1 4 5 0 1 4 5 0 1 4 5 0 1 4 5	A1 A1 A1 A1	3rd Group 3rd Group 3rd Group 3rd Group	Optional Optional Optional Optional
J8100 J8101 J8201 J8200	2 3 6 7 2 3 6 7 2 3 6 7 2 3 6 7	B1 B1 B1 B1	4th Group 4th Group 4th Group 4th Group	Optional Optional Optional Optional

CPU to Memory Group Map

CPU	CPU/Memory Slot	Associated DIMM Group
CPU 0	Slot A	A0, A1
CPU 2	Slot A	B0, B1
CPU 1	Slot B	A0, A1
CPU 3	Slot B	B0, B1
CPU 4	Slot C	A0, A1
CPU 6	Slot C	B0, B1
CPU 5	Slot D	A0, A1
CPU 7	Slot D	B0, B1

System Codenames

Notes

1. Four DIMMs of the same size form a group.
2. The minimum memory is eight DIMMS in groups A0 and B0.
3. DIMMs must be added four-at-a-time within the same group of DIMM slots; every fourth slot belongs to the same DIMM group.
4. Whenever possible, have each group consist of four DIMMs from the same manufacturing vendor.
5. DIMM groups associated with a failed CPU are unavailable for use.
6. Interleaving is limited to memory on the same CPU/Memory Board.
7. Two-way interleaving occurs in any group when the DIMM size does not match the size used in any other group.
8. Four-way interleaving occurs between any two groups when the DIMM sizes are the same.
9. Eight-way interleaving occurs when the DIMMs in all four groups are the same size.

References

1. Sun Fire V480 Server Adminsitration Guide, 816-0904
2. Sun Fire V880 Service Manual, 806-6597