HP ProLiant ML370 - Manual (Page 35)

Mixing DIMM speeds is allowed, but the system processor speed rules always override the DIMM capabilities
If you do mix DIMM speeds, the memory bus will default to the minimum clock rate of all DIMMs in the system - even if
the slower DIMM is on the other processor
If you install 1x 1066MHz DIMM in channel 1 and 1x 1333MHz DIMM in channel 2, the maximum speed will be
1066MHz
If you install 1x 1066MHz DIMM in channel 1 and 5x 1333MHz DIMMs with 1 DIMM Per Channel (DPC) in each of the
other channels, the maximum speed will be 1066MHz
If you install 3DPC in one channel (if applicable) and 1DPC in all other channels, you run at 800MHz
Maximum memory speed will also depend on the processor
References to the above MHz speeds are for the various speeds of DDR3 DIMMs; 1333 refers to DDR3-1333, etc.
DIMM slot and configuration diagrams
Basic memory slot & population diagram
Population order; start with "A" first, "B" second, "C" third, etc.
18 DIMM SLOTS (9 per CPU node)
CPU1 CPU2
slot # population order slot # population order
Chnl 1 1 G 1 G Chnl 1
2 D 2 D
3 A 3 A
Chnl 2 4 H 4 H Chnl 2
5 E 5 E
6 B 6 B
Chnl 3 7 I 7 I Chnl 3
8 F 8 F
9 C 9 C
Standard memory configuration (1 CPU model)
6GB, consisting of three (3) 2GB dual-rank PC3-10600 RDIMMs
CPU1 CPU2
slot # population order slot # population order
Chnl 1 1 G; empty 1 G; empty Chnl 1
2 D; empty 2 D; empty
3 A; 2GB DIMM 3 A; empty
Chnl 2 4 H; empty 4 H; empty Chnl 2
5 E; empty 5 E; empty
6 B; 2GB DIMM 6 B; empty
Chnl 3 7 I; empty 7 I; empty Chnl 3
8 F; empty 8 F; empty
9 C; 2GB DIMM 9 C; empty
Standard memory plus optional memory (1 CPU model)
54GB, consisting of three (3) 2GB RDIMMs plus six (6) 8GB RDIMMs
3x 2GB dual-rank PC3-10600 RDIMMs
6x 8GB dual-rank PC3-10600 or PC3-8500 RDIMMs
QuickSpecs
HP ProLiant ML370 Generation 6
Memory
DA - 13242 Worldwide QuickSpecs — Version 21 — 3-29-2010 Page 35