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Old November 10, 2012, 08:34 AM
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Originally Posted by tethlah View Post
Something I'm doing is building out a liquid cooled system that will include an i7-3770k. I've been doing a lot of research on what is a safe VCORE for overclocking and I've been getting nothing but numbers with no theory or explanations to validate the numbers or help me learn why what they chose. So keeping in mind that I have an unlocked CPU that I can adjust clock and voltage as I see fit, how do you figure out what i safe on the CPU? I'm looking for performance, and since I'm liquid cooling in a room that is an average of 65 degrees year round with no humidity, I should be able to regulate temperature just fine. (I'm running a dual 120 rad and a triple 120 rad in my loop)

So when it comes to overclocking and VCORE, what is safe, where do you see lifetime degradation vs performance degradation? Is there a good practice or solid numbers on this specific CPU that I'm missing? And I guess in general what, if any, increase will I see upping the VCORE when overclocking the clock? I'm thinking I should be able to go up to 4.5 on the clock. (or do you think i could go higher/lower?)
Intel states that max safe voltage is 1.52v. Anything past that can possibly degrade or completely destroy your chip. Many people go higher and I have seen recommendations of up to 1.55v. Keep in mind voltage is not the only killer of chips, but heat so you CAN push it higher if you are comfortable with your cooling setup. IMO You can push it up to the max safe recommended by intel as long as you can keep your chip within acceptable temperatures. And you can go higher if you are willing to risk damaging your chip :). If you are going SB/IB you should be able to go higher then 4.5 provided you have adequate cooling.

Here is a little chart I found on a different site about IB overclocking. Also keep in mind not all chips are created equal. They all require different voltage for different clocks. Each one is individual just like people I guess :P So you may not be right on par with the fellow that made these as he stated he got an excellent chip.







and just for reference... my 3570k will do 4.7GHz @ 1.325v. I can go higher but my chip produces so much heat that the extra 1-200 mhz is not worth the extra heat. I need to jump all the way to almost 1.4v for 4.8.



I'm curious to get my old 2500k from my friend, throw it in and see the temp differences between the 2500k @ 5.2ghz and my IB at 4.7. I bet the 2500k runs cooler.
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Old November 18, 2012, 12:23 PM
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Keep in mind also to check in Administrative Tools>Event Viewer>Warnings>"WHEA Logger" errors in regards to the processor errors when overclocking.

If you are logging repeat errors in there when stress testing or otherwise and they are regards to processor then its add more V core............. or if that is no good 'cause the unit is to warm back down the overclock/increase cooling
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Old November 18, 2012, 01:22 PM
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what i figured i would do is keep records for a couple weeks for baseline at air cooled, then see what percent drop i get out of liquid cool, then try to go to about 4.2 or 4.3 to see what the temps are like and step it up every week and see how it goes. Seem like a normal way to do it?
set the multiplier for 45 and use the least amount of voltage to keep it stable (24 hour folding/prime95/IBT for me) Mine happens to be 1.328v and hovers around 63C fully loaded from folding, cooled by an H100

After that, the temps you get are the temps you get. You don't need baselines. If it's too hot, which it won't be, then lower the OC

By the way, some of these processors will do 4.5ghz at stock voltage, with no increase.

After about 1.35 voltage or typically around 4.5ghz the amount of volts needed to make it go faster quickly lose its appeal.

Cranking it up to 1.5 volts to get 4.7ghz vs 4.5 at 1.328 isn't really worth it, especially with a temp difference of 90C vs 63C
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Old November 23, 2012, 10:21 PM
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In most cases you will never see a 24/7 oc stable at above 1.5v anyways on ivy.

to be honest after 1.3v your seeing massive heat increase's on water or air your seeing them those are going to limit your oc more than likely.

most of these chips have a sweet spot where they take less voltage and much less heat for a certain point of overclock and require a substantial jump in voltage and heat to achieve 100 more mhz. for me its 4.7 to 4.8 i can stabilize 4.8 but its quite warm on this setup . heat is what degrades components imho.

i can also stabilize 4.9 but i don't it just requires to much voltage it seems to be exponential unless under cold..
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