Lenovo ThinkSystem SR665, Setup Manual

Page: 145 / 268

Table 23. Memory slot and channel identification
Channel D1 D0 C1 C0 B1 B0 A1 A0 E0 E1 F0 F1 G0 G1 H0 H1
Slot number
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
Rules you need to follow when installing or replacing a DIMM.
•
Slot
:
– When a
data bus daisy chain topology
is used: populate DIMMs
from farthest slot (slot 1) to closest
slot (slot 0) to the processor
on a per-channel basis.
– When a
data bus balanced tee route topology
is used: populate DIMMs
in either slot
on a per-
channel basis.
Table 24. DIMM installation sequence
Number of processor Slot sequence
With one processor
14, 16, 3, 1, 10, 12, 7, 5, 13, 15, 4, 2, 9, 11, 8, 6
With two processors 14, 30, 16, 32, 3, 19, 1, 17, 10, 26, 12, 28, 7, 23, 5, 21, 13, 29, 15, 31, 4, 20, 2, 18, 9, 25,
11, 27, 8, 24, 6, 22
•
Capacity
:
DIMMs with different capacities (only two different capacities)
can be mixed
, install the one with
the
highest capacity first
.
•
Rank
:
DIMMs with different ranks
can be mixed
, install the one with
the highest rank first
.
•
Frequency
:
DIMMs with different frequencies
can be mixed
in the same channel.
•
Voltage
:
DIMMs with different operating voltage
cannot be mixed
. (The only supported DIMM voltage is 1.2V.)
•
ECC/Non-ECC
:
ECC and non-ECC DIMM
cannot be mixed
. (Non-ECC DIMM is not supported for the server.)
•
DRAM
:
x4 and x8 DRAM based DIMMs
can be mixed
, but
not in the same channel
.
•
Type
:
DIMMs of different base module types
can be mixed
, but
not in the same channel
.
•
Vendor
:
DIMMs from different vendors
can be mixed
in the same channel.
Chapter 4
.
Server hardware setup
141