Dell PowerEdge M820 (for PE VRTX) - Handbuch (Seite 62)

Tabelle 2. Konfigurationen von Prozessor und Kühlkörper
Prozessorkonfig
uration
Prozessor
typ (in
Watt)
Kühlkö
rper
Anzahl der DIMMs
Maximal
RAS-Funktionen
(Zuverlässigkeit,
Verfügbarkeit und Wartung)
Zwei
Prozessoren
bis zu 95
W
67 mm
24 (drei DIMMs je Kanal) 24 (drei DIMMs je Kanal)
Zwei
Prozessoren
Über 95 W 87 mm 20 (drei DIMMs in den
Kanälen 0 und 3 und zwei
DIMMs in den Kanälen 1
und 2)
16 (zwei DIMMs je Kanal)
Vier Prozessoren bis zu 95
W
67 mm 48 48
Vier Prozessoren Über 95 W 87 mm 40 (drei DIMMs in den
Kanälen 0 und 3 und zwei
DIMMs in den Kanälen 1
und 2)
32 (zwei DIMMs je Kanal)
Mode-specific guidelines
Four memory channels are allocated to each processor. The allowable configurations depend on the
memory mode selected.
ANMERKUNG: x4 and x8 DRAM based DIMMs can be mixed providing support for RAS features.
However, all guidelines for specific RAS features must be followed. x4 DRAM based DIMMs retain
Single Device Data Correction (SDDC) in memory optimized (independent channel) mode. x8 DRAM
based DIMMs require Advanced ECC mode to gain SDDC.
The following sections provide additional slot population guidelines for each mode.
Advanced ECC (lockstep)
Advanced ECC mode extends SDDC from x4 DRAM based DIMMs to both x4 and x8 DRAMs. This
protects against single DRAM chip failures during normal operation.
Memory installation guidelines:
• Memory modules must be identical in size, speed, and technology.
• DIMMs installed in memory sockets with white release levers must be identical and similar rule applies
for sockets with black release levers. This ensures that identical DIMMs are installed in matched pairs -
for example, A1 with A2, A3 with A4, A5 with A6, and so on.
ANMERKUNG: Advanced ECC with Mirroring is not supported.
Memory optimized (independent channel) mode
This mode supports SDDC only for memory modules that use x4 device width, and the mode does not
impose any specific slot population requirements.
Memory sparing
ANMERKUNG: To use memory sparing, this feature must be enabled in the System Setup.
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