intel i7 vdimm topics collection

http://www.augustinefou.com/search?q=vdimm

vdimm - voltage of the RAM memory modules, usually tweaked by overclockers to achieve higher speed and performance

i7 - the brand name of the new Intel microprocessors. The microarchitecture of this new generation of processors has the memory controller built into the processor. 

the "Core i7 vdimm issue" talks about the fact that the voltage of the RAM modules cannot (and should not) be tweaked independently of the CPU voltage (vcore). Otherwise if the vdimm is raised too high and the RAM is "fried" the CPU will be "fried" too. This was not the case in previous microarchitectures because the memory controller was NOT built into the CPU itself. 

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Core i7 vdimm problem, aka "Is High VDimm really a Problem?"

the answer is below. 

Source:

http://www.nehalemnews.com/2008/07/rumor-sli-on-nehalem-whats-latest.html

Source:

http://www.anandtech.com/memory/showdoc.aspx?i=3426

"Intel's stance is clear on this subject, run VDimm higher than their 1.50V~1.65V guidelines and you will affect the life span of the processor." "We have already witnessed several CPUs being damaged or destroyed at the motherboard partners with high VDimm settings, especially those that ran at 2.0V or higher with base settings."

"this platform offers simply amazing bandwidth and latency numbers with tri-channel DDR3 1066 or DDR3 1333. In fact, we think tri-channel DDR3-1333 at 5-5-5-12 timings or DDR3-1500~DDR3-1600 6-6-5-15 settings (1.65V) will provide optimal memory bandwidth, write speeds, and latencies for 95% of the users at this point.  So, unlike the P45/X38/X48 platforms, having low-speed rated DDR3 is not going to be a hindrance to extracting fantastic performance from a i7/X58 setup."

Source:

http://www.tomshardware.com/news/intel-i7nehalem-memory-voltage,6464.html

Overvolted RAM May Kill Your Core i7 CPU

4:20 PM - October 8, 2008 by Aaron Heibert Source: Tom's Hardware – Category : Motherboards

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Memory controllers built into the upcoming Core i7 processors could change the way some enthusiasts push their systems beyond spec.

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