i7 920 overclocking help

[krazyken]

Hi guys,
i've been trying to overclock  my i7 920 to 4ghz (air-cooled) with vcore voltage set to 1.09.  everything was running stable but then I noticed some high temps, checked it with hwmonitor and it says the cpu vcore is set to 1.121? I don't understand why would it be different.

any ideas why?

[Platypus Team]

It's quite normal for your vcore to fluctuate slightly.  But anymore than .03-.05 difference and I would become more concerned.  It's likely that the OC could be stressing the PSU, but like I said small fluctuations are perfectly normal. 

But your vcore levels seem fine.

As far as the high temps, you may need to assess your case layout and cooling capacity.  Also if you haven't cleaned your system in a while, dust can build up inside the fins of the heatsink and clog up your fans as well.  A good cleaning and a well placed fan or upgraded heatsink can do wonders for your temp problems.

[gaji750]

We decided to find the maximum frequency our Core i7-920 processor will be able to hit without any additional voltage increase. For this experiment we locked the processor core voltage and Uncore voltage at their standard 1.2V in the ASUS P6T Deluxe mainboard BIOS. Note that using Auto setting is not recommended for these voltages, because in this case the mainboard will increase them on its own during overclocking without your knowledge or control.The information we have just given you in the first part of our article suggests the best ways of overclocking Core i7 processors. The main idea behind it is to increase the base BCLK frequency that results into CPU clock frequency increase. However, since BCLK is also connected to a few other system frequencies, such as North Bridge built into the processor, memory and QPI bus, you should better use lower multipliers for Uncore, DDR3 SDRAM and QPI frequencies during overclocking.
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