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DL3680 G6 72GB memory issue


DL3680 G6 72GB memory issue

need help...
one of our customers have a dl380 g6 f/w level 2009.10.01. we like to use 72GB PC3-10600 RDIMMS. our problems is the system can only see 48GB. according to "Online DDR3 Memory Configuration Tool" the setup should work. we also phoned HP server support they also said same thing.

if anyone has seen this issue before your help is much appreciated.

Frequent Advisor

Re: DL3680 G6 72GB memory issue


Have you checked in the RBSU whether you have Online Spare configured for your memory ?. If so, your OS will only check 2 banks and 3rd bank will be used as spare in case 1 bank fails.
Honored Contributor

Re: DL3680 G6 72GB memory issue

use this click on memory


* For servers with eighteen (18) memory slots:
o There are three (3) channels per processor; six (6) channels per server
o There are three (3) DIMM slots for each memory channel; eighteen (18) total slots
o Memory channel 1 consists of the three (3) DIMMs that are closest to the processor
o Memory channel 3 consists of the three (3) DIMMs that are furthest from the processor
* DIMM slots that are white should be populated first
* Do not mix Unbuffered memory (UDIMMs) with Registered memory (RDIMMs)
* Do not install DIMMs if the corresponding processor is not installed
* If only one processor is installed in a 2CPU system, only half of the DIMM slots are available
* To maximize performance, balance the total memory capacity between all installed processors
* It is not required, but it is recommended to load the channels similarly if possible
* You can only have up to eight (8) ranks installed per channel
* You can only install two quad-rank DIMMs per channel
* You can only install two UDIMMs per channel; if available, the third slot in the channel must remain empty
* Populate DIMMs from heaviest load (quad-rank) to lightest load (single-rank) within a channel
* Heaviest load (DIMM with most ranks) within a channel goes furthest from the chipset
* For memory mirroring mode, channel 3 must be unpopulated. Channels 1 and 2 are populated identically
* For lock-step mode, channel 3 must be unpopulated. DIMMs in channels 1 and 2 will be installed in pairs. The paired slots will be 1,4; 2,5; 3;6 on a 3DPC system or 1,4; 2,5; on a 2DPC system
* No mixing DIMM voltage; all DIMMs must be the same voltage

make sure you have latest bios installed too

This is how we thank each other in the forum

ps the memory configurator has issues use this document