the answer is below.
Source:
Source:
"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
Memory controllers built into the upcoming Core i7 processors could change the way some enthusiasts push their systems beyond spec.