Dell PowerEdge M620 Technical Manual

Also see for PowerEdge M620: Command reference guide Glossary Owner's manual Administrator's guide Hardware reference manual

Contents

Dell PowerEdge M620 Technical Manual Manual pdf 18 page image

 Up to two quad-rank (QR) DIMMs and up to three dual-rank (DR) or single-rank (SR) DIMMs maybe populated per channel. Although an LRDIMM is physically a QR DIMM, logic on the LRDIMMcan make it appear as a DR DIMM to the system, allowing up to three LDRIMMs per channel. DIMMs must be installed in each channel, starting with the DIMM farthest from the processor. DIMMs should be installed with largest rank count to smallest. For example, if DR DIMMS aremixed with SR DIMMs, DR DIMMS should be placed in the lowest DIMM slots, followed by the SRDIMMs.For more information on memory configuration and population, see theDell PowerEdge M620Systems Owner’s Manual on Support.Dell.com/Manuals.The M620 supports memory speeds of 1600MT/s, 1333MT/s, 1066MT/s, and 800MT/s depending onthe DIMM types installed and the configuration. All memory on all processors and channels run atthe same speed and voltage. By default, the system runs at the highest speed for the channel withthe lowest DIMM voltage and speed. The operating speed of the memory is also determined by themaximum speed supported by the processor, the speed settings in the BIOS, and the operatingvoltage of the system.Table 8 lists the memory configuration and performance details for the M620, based on thepopulation of the number and type of DIMMs per memory channel.