QuickSpecs

The memory subsystem in this server is divided into channels. Each processor supports eight channels, and each channel supports
three DIMM slots, as shown in the table below. White DIMM slots denote the first slot of a channel (Ch 4A, Ch 9B, Ch 1C, Ch 12D...).
Channel Population order Slot number
1
A
E
J
4
5
6
2 B
F
K
9
8
7
3 C
G
L
1
2
3
4 D
H
M
12
11
10
The server can operate in independent channel mode (performance) or combined channel mode (lockstep). Lockstep mode improves
the system reliability and availability. If running with RDIMM (built with x4 DRAM devices), the system can survive the complete failure
of two DRAM devices (DDDC). Running in independent mode, the server can only survive the complete failure of a single DRAM device
(SDDC).
Independent channel mode (Performance mode) :
The server supports the following DIMM speeds as shown below in the table.
DIMM type DIMM rank Voltage 1 DIMM per channel 2 DIMMs per channel 3 DIMMs per channel
RDIMM Single-rank (4 GB) LV 1333 1066 1066 (1.5V) *
RDIMM Single-rank (4 GB) STD 1333 1333 1066
RDIMM Single-rank (8 GB) LV 1333 1066 1066 (1.5V) *
RDIMM Single rank (8 GB) STD 1333 1333 1066
RDIMM Dual-rank (16 GB) LV 1333 1066 1066 (1.5V) *
RDIMM Dual-rank (16 GB) STD 1333 1333 1066
LRDIMM Quad-rank (32GB) STD 1333 1333 1333
NOTE:
Depending on the number of DIMMs installed, whether LRDIMMs or RDIMMs are installed, and whether the DIMM is operating and
standard or low voltage, the memory clock speed can be reduced to 1333 or 1066 MT/s.
When 3 DIMMS per channel are installed with the LV DIMMS the system will default to standard voltage.
Lockstep mode :
The server supports the following DIMM speeds as shown below in the table.
QuickSpecs
HP ProLiant DL580 Generation 8 (Gen8)
Memory
DA - 14743 North America — Version 1 — February 18, 2014 Page 39