Seeking a rock solid stable overclock that I can trust (4820K)

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Nullpersona

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Nov 24, 2015
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My build:
https://pchound.com/q02oZY/

CPU: Intel Core i7-4820K ($0 - Owned)
Motherboard: ASUS Sabertooth X79 ($0 - Unavailable)
Memory: Mushkin Enhanced 16GB (2 x 8GB) Silverline ($0 - Owned)
Memory #2: Mushkin Enhanced 16GB (2 x 8GB) Silverline ($0 - Owned)
Memory #3: Mushkin Enhanced 16GB (2 x 8GB) Silverline ($0 - Owned)
Memory #4: Mushkin Enhanced 16GB (2 x 8GB) Silverline ($0 - Owned)
Video Card: ZOTAC GeForce GTX 780 AMP! SUPERCLOCKED ZT-70203-10P ($0 - Unavailable)
Video Card #2: ZOTAC GeForce GTX 780 AMP! SUPERCLOCKED ZT-70203-10P ($0 - Unavailable)
Power Supply: Thermaltake 1200W Toughpower Grand TPG-1200M ($0 - Owned)
Storage: Western Digital 4TB RE WD4000FYYZ ($0 - Owned)
Storage #2: Kingston 120GB SSDNow V300 Series SV300S37A/120G ($0 - Owned)
Storage #3: Kingston 120GB SSDNow V300 Series SV300S37A/120G ($0 - Owned)
Storage #4: SAMSUNG 256GB 850 Pro Series MZ-7KE256BW ($0 - Owned)
Storage #5: SAMSUNG 256GB 850 Pro Series MZ-7KE256BW ($0 - Owned)
Case: COOLER MASTER CM Storm Series Trooper (SGC-5000-KKN1) ($0 - Unavailable)
CPU Cooler: CORSAIR CW-9060009-WW ($0 - Owned)
Windows: Microsoft Windows 10 Professional - Full Version 32 & 64-Bit (Download) ($0 - Owned)
Windows #2: Microsoft Windows 8.1 - 64-bit - OEM ($0 - Owned)
Mouse: RAZER DeathAdder 2013 ($0 - Unavailable)
Keyboard: RAZER Blackwidow Ultimate Stealth Edition ($0 - Owned)
Headphones: SONY MDR-V6 ($0 - Owned)
Monitor: SAMSUNG U28E590D ($0 - Owned)
Optical Drive: LG WH16NS40 ($0 - Owned)
Thermal Compound: Arctic Silver AS5-3.5G ($0 - Owned)
Sound Card: Creative Sound Blaster X-Fi Xtreme Audio ($0 - Owned)


My dump:
http://valid.x86.fr/m0u2n4


If more info is needed, I will provide it. I have tried using the information I have understood from these forums, but stability is an issue. I am experiencing infrequent crashes, and problems restarting at lower voltages, but am concerned about going too high? I am not sure if the CPU strap is a good idea, with it overclocking the RAM? I don't know if my RAID is safe, or faster than they would be alone? High heat on video cards, may be due to not enough positive pressure in case when many other neg fans are high? Have an HT Omega Claro sound card from previous build, is that a better choice than the X-Fi? Lots of questions.

My "Stable OC" from before this post:
 
Solution
Karadjgne
From your dump it looks like you are using BCLK to OC, not just the multiplier. For an intel cpu, this isn't the best idea. BCLK is the buss clock. It means you raise the speeds of everything, and I mean everything, from the cpu, to ram, gpu, hdd, any and all communications that are currently used on the motherboard itself. This is your instability issue. You aren't using the cpu as much as overworking everything else. Even on a very good motherboard, you are going to have heat issues from anything from the pcie to mc to VRM's.

Drop the BCLK back closer to 100, raise the multiplier multiplier closer to 48 and settle any LLC, current, PLL, issues.
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Karadjgne

Karadjgne

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From your dump it looks like you are using BCLK to OC, not just the multiplier. For an intel cpu, this isn't the best idea. BCLK is the buss clock. It means you raise the speeds of everything, and I mean everything, from the cpu, to ram, gpu, hdd, any and all communications that are currently used on the motherboard itself. This is your instability issue. You aren't using the cpu as much as overworking everything else. Even on a very good motherboard, you are going to have heat issues from anything from the pcie to mc to VRM's.

Drop the BCLK back closer to 100, raise the multiplier multiplier closer to 48 and settle any LLC, current, PLL, issues.
 
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Solution
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Nullpersona

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Nov 24, 2015
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Auto Voltages, max llc.

I will run some benches to test stability and performance.

If there are any that you would like to see, please list them.

Real Bench 2.41 crashed with "Memory Management" BSOD twice.

Changed voltage to Manual, 1.395V.



Real Bench 2.41:

Image Editing
119126
Time:72.024


Encoding
87276
Time:137.356


OpenCL
83627
KSamples/sec: 2115


Heavy Multitasking
83816
Time:116.684


System Score
76735


PCMark 7:
http://www.3dmark.com/compare/pcm7/998726/pcm7/995343#

Score 6210
 
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Karadjgne

Karadjgne

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Dl prime95 v26.6 and realtemp. Both free. Run that torture test for a solid hour under small fft. This is to account for liquid cooling temp stabilization. Start at 1.25v, very high LLC (75% or so) 110% current, disable things like c-states, and try BCLK at 100, multiplier at 45 and go from there.

Google things like OC for Intel and your cpu and mobo, there'll be tricks in your bios that other OC'rs will have found works.
 
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Nullpersona

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Disabled C-States.

p95_1512141526.jpg


After this screenshot, I was listening to that mp3 (after staring at it for an hour, why not?). I got a warning that my 12V was reading 0.00. It didn't seem to affect anything.

In my previous "stable" profile, the QPI and Core speed matched. I was under the impression that is ideal. Should I try raising the BCLK at all to bring them closer?
 
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Karadjgne

Karadjgne

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Generally, for Intel cpu's, OC is a matter of fine tuning the bios with a multiplier, BCLK is left at 100. Motherboard OC software will also raise the BCLK to 103-105 but this is a minimal OC as it does affect ram and gpu, which have too many varieties and variables to consider trustworthy.

How exactly you personally OC is up to you, can't say as any one way is better or not, but multiplier OC is easier than BCLK, and removes potential unwarranted OC of other components.
 
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Nullpersona

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So, CPU Strap is possible, just much more (ridiculously) difficult to stabilize than overclocking using the multiplier?

I will try bumping the multiplier up slowly, then the core voltage(in small increments), as it fails, going back down if more than 1.4v are needed to stabilize. Does that sound reasonable, or should I adjust that behavior?
 
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Karadjgne

Karadjgne

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sounds about right, just remember, that's the basics for a simple oc. Once you get over @ 4.3GHz you start in on the more advanced oc where the unstable stuff like c-states need to be disabled, pll voltage, current etc.

Google OC with your motherboard, its out there and many have tips that will be different for different bios, but the basic idea (if not necessarily the names) will be the same
 
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Nullpersona

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Is there a way to know the proper settings to get the most out of your system, other than trial-and-error?

This is 100x48 Stable, based on your advice. The voltage is above 1.4, but the temps seem okay.
p95_1512151611.jpg

47 was stable at 1.375, 46 at 1.35
Thanks for your help!
 
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Karadjgne

Karadjgne

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There are no proper settings as such with OC, its all trial and error, but there are variations and opinions that generally coincide, like disable c-states, which will OC just fine, but will require a slightly higher voltage for stability after coming out of sleep.

If you got 4.7 stable that's good. At least you know the cpu can go there. If you choose, you could back the multiplier down to 4.6, drop the voltage a little until it's firmly stable, then bump the BCLK a small amount, to 101 etc and see how high that gets you, but I'd not take it past the next size ram, 1866. You should be able to get somewhere around the 4.8 you wanted without too much pressure on the cpu and other components like the 125 you started with.

I'd also set this as a bios profile for top performance, and go with a lower OC on another profile for 24/7 usage.
 
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