Cisco Systems UCS C220 M3, A03D1TBSATA manual CPUs and DIMMs, Physical Layout

SUPPLEMENTAL MATERIAL

7	CPUs and heatsinks (two)	16	Power supplies (two, hot-swappable
			access through rear panel)
8	Integrated RAID on motherboard, and mini-SAS	17	RTC battery on motherboard
	connectors
9	Mezzanine RAID card, mini-SAS connectors	18	Software RAID 5 header (RAID key).
	SAS1 and SAS2

CPUs and DIMMs

Physical Layout

Each CPU has four DIMM channels:

■CPU1 has channels A, B, C, and D

■CPU2 has channels E, F, G, and H

Each DIMM channel has two banks: bank 1 and bank 2. The blue-colored DIMM banks are for bank 1 and the black-colored are for bank 2.

As an example, DIMM slots A1, B1, C1, and D1 belong to bank 1, while A2, B2, C2, and D2 belong to bank 2.

Figure 7 shows how banks and channels are physically laid out on the motherboard. The DIMM slots on the right (channels A, B, C, and D) are associated with CPU1, while the DIMM slots on the left (channels E, F, G, and H) are associated with CPU2. The bank 1 (blue) DIMM slots are always located farther away from a CPU than the corresponding bank 2 (black) slots. Bank 1 slots (blue) are populated before bank 2 slots (black).

48 Cisco UCS Cisco UCS C220 M3 High-Density Rack Server (Small Form Factor Disk Drive Model)