Intel Core i7 and DDR3 memory voltage

Update: Seems was correct higher vdimm is possible only if you keep a balance between bios voltages particularly the requirement that uncore voltage needing to be within 0.5v of vdimm memory voltages.

Asus latest X58 motherboard’s warning label where DDR3 memory voltages above 1.65v can cause permanent cpu damage, has raised some questions as to whether or not high end performance would suit the new Core i7’s IMC (integrated memory controller) and whether high memory voltage will kill the Core i7’s memory controller. decided to ask various memory manufacturers their opinion and stance on this.  You can read their opinion on the matter as well as what Corsair, Crucial, Kingston, Mushkin, OCZ and Super Talent had to say when asked here. also shares their opinion on the matter and they have hinted that it’s not as simple as one might think.  It seems to properly overclock memory on Core i7’s integrated memory controller with X58 chipset will require us to unlearn our X48 DDR3 methods completely.

we have seen high VCore/VDimm test beds operate without a problem for benchmarking purposes (yet still fail with long-term bench testing) provided a multitude of BIOS settings for the core, DIMM, IMC, Uncore, and QPI selections were properly set. The base secret (there are more) is maintaining correct amplitude levels, something we will discuss at product launch. For now, high VDimm is not necessarily the true problem here, but it is the quickest way to damage/destroy an i7 if the system is not properly tuned

You can read the full article here.

About the Author