Maximum Safe i5-6600K overclock that will last 3yrs+

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WelcomeToMyChasm

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Aug 12, 2016
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MY PC SPECS
Okay so I have no clue how to word this but basically i want to overclock my 6600K but don't know how far to go. I know nothing about computers and I am confused about what is a safe overclock and a safe voltage to put a 6600K with only a Corsair H60 cooling loop. If someone could just give me some good settings then I will b very greatful

Thanks
 
Solution
First of all, the max oc will be determined by your luck in getting a good chip.

As of 5/2016
What percent can get an overclock at a somewhat sane 1.40v Vcore.

I5-6600K
5.0 2%
4.9 11%
4.8 36%
4.7 64%
4.6 88%

Intel puts the max vcore at 1.5v. More commonly, 1.4v is considered the safe max.

You OC by simply raising the max multiplier from the default 35 to a higher number.
You can leave all of the voltages on Auto.
Stress test using OCCT or such. Prime95 and IBT do not use common instructions.
OCCT will stop the test at 85c.
When you reach your limit, implement speedstep. This will lower the vcore and multiplier when the cpu is not stressed.

14nm skylake runs cool. You will run out of safe vcore before you run into...

philipew

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Jul 26, 2016
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Yes, I agree, even from within the BIOS (manually).
 

philipew

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Jul 26, 2016
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Prime95 is still my favorite. It offers mostly a "blended" test (default) and a "heat" test (top selection). They are demanding beyond belief (or even beyond practical everyday use?), so if you pass these two tests for say 2H and 30 min. respectively with all green results, then you already have a pretty good idea that your rig will cope with anything you could possibly throw at it.

The heat test is probably the most important. For example, after a perfect "blend" test of 2H under 4.7 GHz at 1.40 V VCore, I started a "heat" test. After five minutes into the test it already gave me a BSOD (blue screen) error. The reason was easy to determine --> too much heat (package temp. over 85C, throttling of the CPU, and eventually precautionary stop by the system to avoid damage).

So in the end, it's the temps more than anything that limit performance. It's OK when connected to a Cooler Master MasterLiquid Pro 240 CPU Cooler instead of my cheap single fan air cooler. However, I really don't like water cooling. So I stay on a quiet 4.6 GHz air cool.
 

philipew

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Jul 26, 2016
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I also always considered that water and electricity don't mix, just like rough mechanics and fine electronics. Maybe it's just me, but water cooling seems like a bad idea altogether. If at least an inert gas (like with the compressor of a refrigerator or air conditioning unit) were used instead of highly conductive plain tap water, then maybe... My rig is not the motor of a truck ;-). Here is a picture of the inside: http://imageshack.com/a/img923/3196/PjaqTS.png
 

philipew

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Jul 26, 2016
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Try 4.6 GHz with:
CPU VCore at 1.355 V,
CPU Core Ratio at 46,
Uncore (cache) Ratio at 45,
FCLK at 1 GHz,
XMP on Profile 1,
PCH at 1.00 V,
LLC (Load Line Calibration) on High, and
Internal Graphics Disabled (using graphics cards).

Leave all the other settings on their default value (been there, done that, not worth the trouble and maybe dangerous).

 

philipew

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Jul 26, 2016
168
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Prime95 (like 28.9 build 2) is still my favourite (free download). You can have a blend test (CPU + memory) and a heat test (mostly CPU) - this is like a gold standard among many overclockers and has been for years now. Just make sure you keep an eye on your temps (in real time) when you do it. Using CPUID HWMonitor (free version) is sufficient for that.

Here are my current, and ultra stable/safe, BIOS settings for i5 6600K on Gigabyte GA-Z170XP-SLI:
[1] - CPU Core Ratio: 46
[2] - FCLK Frequency For Early Power: 1 GHz
[3] - Uncore Ratio: 46
[4] - CPU Flex Override: Disabled
[5] - Intel Turbo Boost Technology: Disabled
[6] - CPU Enhanced Halt (C1E): Disabled
[7] - C6/C7 State Support: Disabled
[8] - C8 State Support: Disabled
[9] - CPU Thermal Monitor: Enabled
[10]-CPU EIST Function: Enabled
[11]-Voltage Optimization: Enabled
[12]-Residency State Registration (RSR): Disabled
[13]-Hardware Prefetcher: Enabled
[14]-Adjacent Cache Line Prefetch: Enabled
[15]-Extreme Memory Profile (X.M.P.): Profile 1
[16]-System Memory Multiplier: 32
[17]-Memory Enhancement Settings: Relax OC
[18]-Channel Interleaving: Enabled
[19]-Rank Interleaving: Enabled
[20]-CAS Latency: 15
[21]-tRCD: 17
[22]-tRP: 17
[23]-tRAS: 28
[24]-Command Rate (tCMD): 1
[25]-CPU VCore Loadline Calibration (LLC): High
[26]-CPU VCore: 1.355V
[27]-CPU VCCIO: Normal
[28]-CPU System Agent Voltage: Normal
[29]-PCH Core: Normal
[30]-DRAM Voltage (CH A/B): 1.360 V
[31]-Internal Graphics: Disabled

Have a look here for the fans: https://postimg.org/image/3t7g3ljjt/
 
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