On Wed, 12 Mar 2008, Liu, Jiang wrote: >/ All, />/ I would like to propose a project to enable FB-DIMM idle power />/ saving on Intel 5000P/5000V/5000Z MCH chipsets. />/ Intel 5000 series MCH chipsets have a thermal protection />/ mechanism which can be used to reduce FB-DIMM power consumption when />/ system is idle. This power saving mechanism has been proven to be very />/ useful in real IDC. On the other hand, platforms based on Intel 5000 />/ series MCH will continue to ship until the end of 2009 plus 4-5 years' />/ lifetime. So enabling FB-DIMM power saving feature can make systems />/ based on 5000 series MCH more power efficient and save money for />/ customers. />/ Any thoughts or suggestions?
Hi Gerry, >From your proposal it sounds like FB-DIMM power consumption can be reduced when the system is idle. How does this work? From your previous emails this feature applies to whole memory which means that one can not turnoff specified chunks of memory. Is this correct? Does this mean that for memory in a "lower power state" (or LPS) all data is preserved?. >From what I understand so far is that if system tries to access LPS memory the software has to enable memory (via register) and then memory can be accessed again. When the system is idle and the memory is off we can't execute code from RAM? Stan />/ />/ Liu Jiang (Gerry) />/ Senior Software Engineer />/ OpenSolaris, OTC />/ Tel: (8610)82611515-1643 />/ iNet: 8758-1643 /
