Datasheet

Cisco UCS B420 M3 Blade Server

SUPPLEMENTAL MATERIAL

Each CPU controls four memory channels and 12 DIMM slots, as follows:

■ CPU1: Channels A, B, C, and D

— Bank 0 - A0, B0, C0, and D0 (blue DIMM slots)

— Bank 1 - A1, B1, C1, and D1 (black DIMM slots)

— Bank 2 - A2, B2, C2, and D2 (white DIMM slots)

■ CPU2: Channels E, F, G, and H

— Bank 0 - E0, F0, G0, and H0 (blue DIMM slots)

— Bank 1 - E1, F1, G1, and H1 (black DIMM slots)

— Bank 2 - E2, F2, G2, and H2 (white DIMM slots)

■ CPU3: Channels I, J, K, and L

— Bank 0 - I0, J0, K0, and L0 (blue DIMM slots)

— Bank 1 - I1, J1, K1, and L1 (black DIMM slots)

— Bank 2 - I2, J2, K2, and L2 (white DIMM slots)

■ CPU4: Channels M, N, O, and P

— Bank 0 - M0, N0, O0, and P0 (blue DIMM slots)

— Bank 1 - M1, N1, O1, and P1 (black DIMM slots)

— Bank 2 - M2, N2, O2, and P2 (white DIMM slots)

DIMM Population Order

Populate the DIMMs for a CPU according to Table 23.

Table 23 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 A0 E0 I0 M0

2 A0, B0 E0, F0 I0, J0 M0, N0

3 A0, B0, C0 E0, F0, G0 I0, J0, K0 M0, N0, O0

4 A0, B0, C0, D0 E0, F0, G0, H0 I0, J0, K0, L0 M0, N0, O0, P0

5 Not recommended for performance reasons

6 A0, B0, C0,

A1, B1, C1

E0, F0, G0,

E1, F1, G1

I0, J0, K0,

I1, J1, K1

M0, N0, O0,

M1, N1, O1

7 Not recommended for performance reasons