Datasheet

Cisco UCS B420 M4 Blade Server
40
SUPPLEMENTAL MATERIAL
Each CPU controls four memory channels and 12 DIMM slots, as follows:
■ CPU1: Channels A, B, C, and D
— Bank 1 - A1, B1, C1, and D1 (blue DIMM slots)
— Bank 2 - A2, B2, C2, and D2 (black DIMM slots)
— Bank 3 - A3, B3, C3, and D3 (white DIMM slots)
■ CPU2: Channels E, F, G, and H
— Bank 1 - E1, F1, G1, and H1 (blue DIMM slots)
— Bank 2 - E2, F2, G2, and H2 (black DIMM slots)
— Bank 3 - E3, F3, G3, and H3 (white DIMM slots)
■ CPU3: Channels I, J, K, and L
— Bank 1 - I1, J1, K1, and L1 (blue DIMM slots)
— Bank 2 - I2, J2, K2, and L2 (black DIMM slots)
— Bank 3 - I3, J3, K3, and L3 (white DIMM slots)
■ CPU4: Channels M, N, O, and P
— Bank 1 - M1, N1, O1, and P1 (blue DIMM slots)
— Bank 2 - M2, N2, O2, and P2 (black DIMM slots)
— Bank 3 - M3, N3, O3, and P3 (white DIMM slots)
DIMM Population Order
Populate the DIMMs for a CPU according to Table 25.
Table 25 DIMM Population Order per CPU
DIMMs
per CPU
Populate
CPU 1 Slots
Populate
CPU 2 Slots
Populate
CPU 3 Slots
Populate
CPU 4 Slots
1 A1 E1 I1 M1
2 A1, B1 E1, F1 I1, J1 M1, N1
3 A1, B1, C1 E1, F1, G1 I1, J1, K1 M1, N1, O1
4 A1, B1, C1, D1 E1, F1, G1, H1 I1, J1, K1, L1 M1, N1, O1, P1
5 Not recommended for performance reasons
6 A1, B1, C1,
A2, B2, C2
E1, F1, G1,
E2, F2, G2
I1, J1, K1,
I2, J2, K2
M1, N1, O1,
M2, N2, O2
7 Not recommended for performance reasons